Interesting thing I just noticed about my phone number:
The first three digits add up to nine.
The next two digits add up to nine.
The next one digit adds up to nine. (Technically, it just is nine.)
The next four digits add up to nine.
Of course, that means if you add up all the digits, and then add the digits of that sum, you get nine. (Because the sum of the digits of any multiple of nine is always a multiple of nine, which means if you keep adding the digits of any multiple of nine, no matter how large, together until you finally end up with only one digit, that digit will be nine. Which, by the way, is related to the secret behind this.)