Symbolism of the Number 6 6 6

Origin and History of the number 666
The Babylonian people believed that numbers had power over the gods they worshiped. Each of the 36 supreme gods was assigned a count number in their system which was used in place of the name of each god.
666man.net/666religionhistoryoverview.html

Number Six 6 Hand Symbol
Design and Application of Symbols using fingers and hands. Free Graphic Symbol Pictograms for Identity, Communication, Direction, Location, Way finding sytems.
designofsignage.com/application/symbol/hands/largesymbols/number-six-6.html

The Prisoner
The leading character, Number Six, is a former secret agent of the British government during the Cold War. He is never identified by name. After resigning his position, he is kidnapped and held prisoner in a small, isolated, eccentric seaside resort town known only as the Village. The authorities there attempt to determine — "by hook or by crook" — why Number 6 resigned.
en.wikipedia.org/wiki/The_Prisoner
Number of the Beast    666 (number)   

The Number 666 according to Muslims
According to the Bible, 666 is an evil number, and represents the beast, or the anti-Christ. But to Muslims, this is a holy number. Which interpretation do you choose?
heavenawaits.wordpress.com/the-number-666-according-to-muslims/

Triangular Numbers
The sequence of the triangular numbers comes from the natural numbers, if you always add the next number.
mathematische-basteleien.de/triangularnumber.htm

Beast Number -- from Wolfram MathWorld
666 is the occult "number of the beast," also called the "sign of the devil" (Wang 1994), associated in the Bible with the Antichrist. It has figured in many numerological studies. It is mentioned in Revelation 13:18: "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 666."
mathworld.wolfram.com/BeastNumber.html

Arabic Number 6
The number 6 represents Thoth, the god of wisdom and learning.
resurrectisis.org/Number6.htm