There is a view that there 33 Crore Devas in Hinduism.
Another view is that they are 33.
Please read my post on this under Hinduism.
There are references to Visvedevas in Mantras as in
‘Visvedevan Tharpayami’- Brahmayagnya.
Who are these Visvedevas?
One view is that this term refers to all the Devas together.
But an analysis of the mantras being used indicate that they might be different.
We say ‘Sarvan Deana Tharpayami’ Viswan Deva Tharpayami’
So they have to be different.
The Visvedevas (Sanskrit: विश्वेदेवाः) ( viśve-devāḥ “all-gods”) are the various Vedic gods taken together as a whole. In the Rigveda a number of hymns are addressed to them, including (according to Griffith) 1.89, 3.54-56, 4.55, 5.41-51, 6.49-52, 7.34-37, 39, 40, 42, 43, 8.27-30, 58, 83 10.31, 35, 36, 56, 57, 61-66, 92, 93, 100, 101, 109, 114, 126, 128, 137, 141, 157, 165, 181.
RV 3.54.17 addresses them as headed by Indra,
- This is, ye Wise, your great and glorious title, that all ye Deities abide in Indra. (trans. Griffith)
The dichotomy between Devas and Asuras is not evident in these hymns, and Devas are invoked together with Asuras such as Mitra and Varuna.
Though a large number of devas are named in the Rig Veda only 33 devas are counted, eleven each of earth, space and heaven. In later Hinduism, they form one of the nine ganadevatas (along with the Adityas, Vasus, Tushitas, Abhasvaras, Anilas, Maharajikas, Sadhyas, and Rudras). According to the Vishnu Purana, they were the sons of Vishvā, a daughter of Daksha, enumerated as follows: 1. Vasu 2. Satya 3. Kratu 4. Daksha, 5. Kala 6. Kama 7. Dhrti 8. Kuru 9. Pururavas 10. Madravas, with two others added by some, 11. Rocaka or Locana, 12. Dhvani Dhuri…
Visvedevas Mantra Rig Veda Book 7 Hymn XXXV
1. BEFRIEND us with their aids Indra and Agni, Indra and Varuna who receive oblations!
Indra and Soma give health, strength and comfort, Indra and Pusan be our help in battle.
2 Auspicious Friends to us be Bhaga, Sathsa, auspicious be Purandhi aid all Riches;
The blessing of the true and well-conducted, and Aryaman in many forms apparent.
3 Kind unto us he Maker and Sustainer, and the far-reaching Pair with God-like natures.
Auspicious unto us be Earth and Heaven, the Mountain, and the Gods’ fair invocations.
4 Favour us Agni with his face of splendour, and Varuva and Mitra and the Asvins.
Favour us noble actions of the pious, impetuous vita blow on us with favour.
5 Early invoked, may Heaven and Earth be friendly, and Air’s mid-region good for us to look on.
To us may Herbs and Forest-Trees be gracious, gracious the Lord Victorious of the region.
6 Be the God Indra with the Vasus friendly, and, with Adityas, Varuna who blesseth.
Kind, with the Rudras, be the Healer Rudra, and, with the Dames, may Tvastar kindly listen.
7 Blest unto us be Soma, and devotions, blest be the Sacrifice, the Stones for pressing.
Blest be the fixing of the sacred Pillars, blest be the tender Grass and blest the Altar.
8 May the far-seeing Sun rise up to bless us: be the four Quarters of the sky auspicious.
Auspicious be the firmly-seated Mountains, auspicious be the Rivers and the Waters.
9 May Adid through holy works be gracioas, and may the Maruts, loud in song, be friendly.
May Visnu give felicity, and Pusan, the Air that cherisheth our life, and Vayu.
10 Prosper us Savitar, the God who rescues, and let the radiant Mornings be propitious.
Auspicious to all creatures be Parjanya, auspicious be the field’s benign Protector.
11 May all the fellowship of Gods befriend us, Sarasvati, with Holy Thoughts, be gracious.
Friendly be they, the Liberal Ones who seek us, yea, those who dwell in heaven, on earth, in waters.
12 May the great Lords of Truth protect and aid us: blest to us be our horses and our cattle.
Kind be the pious skilful-handed Rbhus, kind be the Fathers at our invocations.
13 May Aja-Ekapad, the God, be gracious, gracious the Dragon of the Deep, and Ocean.
Gracious be he the swelling Child of Waters, gracious be Prsni who hath Gods to guard her.
14 So may the Rudras, Vasus, and Adityas accept the new hymn which we now are making.
May all the Holy Ones of earth and heaven, and the Cow’s offipring hear our invocation.
15 They who of Holy Gods are very holy, Immortal, knowing Law, whom man must worship,-
May these to-day give us broad paths to travel. Preserve us evermore, ye Gods, with blessings.