Number of his name?
Revelation 13:16 And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads: And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name. Mark{Strong's concordance}charagma khar'-ag-mah from the same as 5482; a scratch or etching, i.e. stamp (as a badge of servitude), or scupltured figure (statue):--graven, mark. or tattooed
The number of his name and the mark are not the same.
Just as 6 is the number of imperfection, and the triple six (666) the pinnacle of Satanic imperfection, 7 is the number of perfection and the triple seven 777 the summit of Yahweh's perfection: the absolute perfection of holiness, power, love, generosity and all those faultless qualities which belong to the Holy One of Israel.
6 represents incompletion, and there are three rebellious chief demonic spirits.
Satan{6} opposes God
Antichrist{6} opposes Jesus Christ
False Prophet{6} opposes the Holy Spirit
I gave it my best shot.