Why IOTA use this ?

As is written in the last book of the Bible, number 666 is the number of beasts of the sea with seven heads and ten horns or names. This beast represents the global political system that governs "all the genders, tribes, languages, and nations." The name 666 shows that this political system is completely inferior to God. Why?

What does the number 666 mean?

Six means imperfection. Numbers in the Bible often has a symbolic meaning. Seven typically represents integer or perfection. Six is one number less than seven, so it can mean something that is incomplete or defective in God's eyes, as well as anything related to the enemy of God
Three times - for emphasis. In the Bible, something is often emphasized by repeating it three times.So the 666 name very clearly shows that political systems, which people created God understands like unworthy.They can not provide lasting peace and security - only the Kingdom of God will do it.

A lot of logos are used by a devil's number. The devil helps to become successful?