This number is used to express man's sufficiency.
Six days were sufficient for man's labor. GOD never intended man to have a five day week, nor an eight hour day. (See Exodus 20:9).
Six steps were sufficient to approach the throne of King Solomon, which was the throne of perfect human judgment. (See1Ki10:19).
The loaves on the table of shewbread were in two rows of six each, and this was a sufficient provision to represent all the tribes of Israel. (See Leviticus 24:6).
The great giant had six fingers on each hand, and six toes on each foot, for he represented the perfect example of that race of giants. (See2Sa21:20).
Six main cities of refuge were sufficient for the protecting care of GOD over the murderer. (See Numbers 35:6).
The mystical number of the antichrist is six hundred sixty-six, for he represents all that man can produce of human wisdom, power and provision. (See Revelation 13:18). This number is arrived at by adding together the numerical values of the letters in the Greek language which compose his name.