I like cool numbers, but I don't believe they have special meaning. 7 does crop up a lot in culture. I think in China they like 8, but then 4 is bad for them, like 13 for some people. There was no 13th floor in a building I worked in.
Anyway, congratulations on having more S than you did before!
Yes, I know about cultural differences regarding auspicious numbers, especially the popularity of 8 in Asia. I was interested in numerology for a while and did quite a lot of reading (also astrology, which t the date still proves to be a valuable context descriptor). Funny that you didn't have a 13th floor :)
I'm more interested in numbers like Pi and e. They help define the universe. People will believe anything :)