I'm no bible scholar but I've read the Revelation and I think those who are sure of what it means are more than likely full of baloney. Read the passages about the beast and 666, "the number of man" iirc, and try to make sense of it. Idefinitely don't know 666 refers to "Satan." Who ever wrote it more than likely got a hold of some psychedelic plants or frogs on the island of Patmos and had some "'visions' that probably don't mean anything. For those who haven't, take any page in Revelation and read it tell me what you think it was about. 
Oooh, "666" and "The Beast" ... scary stuff, A Beast must be Satan. Although I think Satan was described as a beautiful angel elsewhere. Why is the 'number of man' a sign of Satan
And who is 'the whore'? The flying wagons with eyes on the rims were pretty cool, being able to change to any direction in an instant.
I remember some 'Satanists' claim the real number of Satan and Evil is 9. 
Quora:
Regarding Numerology, there are claims that 9 is evil ‘because it’s an inverted 6′, however that cannot be the original case as not everywhere used or uses the same Hindu-Arabic numerals as we do and yet some of these places still consider 9 as evil: 九 is not an inverted 六, for instance.

As you have asked, so shall I answer as best I can.
6 is the Number of Man as God created Man on the sixth day. As I said before, "666" is
thought to be representative of a false trinity, hence the Number of Man repeated 3 times to include "Satan, The Beast and the False Prophet" as that false trinity. Each of these are created beings as opposed to God who is sometimes referenced as "The Self Evident One" or "The Ancient of Days".
The I AM.
I am no Biblical Scholar and more often than not, I do not put much stock in men because of the filth of men.
As said by the "Hospitaller" in the excellent film, "Kingdom of Heaven" as regards men and their "religions" -
I put no stock in religion. By the word religion, I've seen the lunacy of fanatics of every denomination be called the "Will of God". I've seen too much religion in the eyes of too many murderers. Holiness is in right action and courage on behalf of those who cannot defend themselves.It is not difficult to know the difference in right and wrong as well as good and evil. And more. But men will often choose their own will over that which God wants for them. Why?
Men often think with their egos and act with their genitals.As my mother taught me many decades ago, "
People are eager to share their religion but not so keen on actually living their faith".
In other words, people are people and all that statement entails about them.
Do I know more than some? Hmmm...Perhaps it is that I know
some more than others because I have been dead and that for 3 separate times. Or not. I am not come to change anyone's diaper of a mind. That is for each to decide. I only know what I have been told and shown.