In Revelations this is called “the angel from the abyss” and the “beast from the earth”. This beast has the number 666 or 616 and it speaks like the lamb, it gives the spirit to the beast who was en not is, the dichotomy 7 & 8 King.
In the 2 numbers of the beast there is also dichotomy, because one could be for the lamb (Ἀριθμὸς τοῦ θηρίου, Arithmos tou Thēriou) and the other for the beast. θηρίου (Thēriou) can mean both “a wild dangerous animal” and “a hunted animal, to be eaten”
So the lamb could be the hunted animal and have number 666 or 616
So the beast could be the wild and dangerous animal and also have number 666 or 616
Problem with the number of the beast (moreover here we even got 2 possibilities) is that there are so many possibilities and people have always manipulated and recalculated it to fit for Hitler, Napoleon, Nero and many Pope names alike. One can always find a fit by manipulating names of a certain person and go crazy about it.