My favourite number is 7! It is a natural number that follows the number 6 and precedes number 8
I hear that's a lucky number but have never been a big believer in luck. 
Yes, it is known as a lucky number in western countries!
Do you know any interesting facts about the number 7 or numbers in general?
Yes I do, the eastern arabs actually developed the character for 7 by using an uppercase V and rotating it
I can definitely see that. I would have expected it to be from Greeks though.
You can also write 7 with a horizontal line in the middle, but this is usually excluded in computer fonts