What's with the number 7 ?

If you believe in astrology, there might actually be something to the number 7. I do not believe that there is anything special about the number except that for the longest of time there has been some connection with it and luck. I do not believe in luck, even though, I would not mind it once in a while. What I do believe in is that we all have a lucky number and it will probably stick with us for our entire lives. My number is 3 and it has been with me since little league baseball, so I guess it is my lucky number.

well, i know in many coultures its consider lucky and or sacred. Also in the bible 7 represented completion

People say the number 7 is lucky. I don't know why and how it became lucky but they said it is.

As like u sometime me also think about this magic number 7. But i dont find any answer. As im a muslim in our belief the sky is also 7. May be this number have something extra invisible power.