You got 72 there bro. For 666 wouldn't they have said 30 score, 3 score, and 6?
Just out of interest, what numeric notation was used by the dudes who wrote the scrolls?
Yes your right, man you are confusing me, now I am making mistakes lol. OK 600 + 60 +6= 666

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. Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is six hundred threescore and six." (Revelation 13:16-18 KJV)