What does the number 5 mean?

I have a weird thing with the number 5. I was born September 5th, and I see the number everywhere. Heres something recently that happened. I was at a sleepover with my friends and they told me in my sleep I did this. They said I stood up straight while I was still sleeping and I said "This sleeping bag has the initials 555. This one has the initials KKK." then they said I went back down and continued sleeping. Then I woke up, looked at the clock and I said "You guys it's 5:55" Then they told me what I did in my sleep. Could anyone tell me what this means? Thanks