As on the of the most significant numbers in the bible, seven represents spiritual completeness, fathers perfection, and the resurrection. It is used in the bible describing the covenant between God and man.

It is a number that is well used in chemestry, physics, music, and alot more; where the periodic table has 7 levels of periodicity, a rainbow has seven colors (red, orange, yellow, green, blue, indigo, violet), and the base of all music is created on seven basic notes.

Seven is made up of two significant numbers: 3 and 4, Gods perfection and creation together in one, denoting a coming together of heaven and earth, as is talked about in Revelation or the "Our Father" prayer.

In Revelation is also says that there are seven churches, seven spirits, seven stars, seven seals, seven trumpets, seven dooms, seven new things, seven personages, etc, and the tribulation is to last 7 years.

There are 31 102 verses in the King James Bible: 3+1+1+0+2=7. (Just saying) Jesus Christ teaches a total of 37 parables; 3 sevens (777) is the perfection of the Trinity.

The number seven becomes much more complex than this, but is very interesting to look up. (check listverse.com)