Here is where wisdom comes in: Let the one that has intelligence calculate the number of the wild beast, for it is a man’s number; and its number is six hundred and sixty-six. (Revelation 13:18)
The number 6 denotes insufficiency and imperfection...
The wild beast rules over mankind (carbon based lifeforms?

) it's 3X's the imperfection of men (666)... According to the Bible we were never endowed with the ability to rule ourselves. (ecclesiastes 8:9, Jeremiah 10:23) I think humans have proven that to a fault....
666--Not Just a Puzzle --www.watchtower.org/