You don't have to do all that. The secret to 666 IS in Hebrew, but in ancient Hebrew, not modern. And your guesses are wrong. They're too broad.
Here are some clues to 666 and the identity you seek:
*The golden ration
*Fibonacci sequence
*The double helix
* the word is not Beast with long E, but it is Baah-Saht! (with the sheep sound baa! The word is a direct transliteration of a Hebrew word).
*And if you are Khakassian (I wrote the correct form), then YOU are part of the equation
It is a riddle that most will never guess. Unless, of course, you're fluent in Hebrew.
But I will throw you a bone: the number 666 is a palindrome.
What goes out, returns, and what goes around, comes right back! It is the law that governs all of creation. Think circular; it helps, and if you discard the Hebrew, you won't get far at all.