If we assign each letter in "SwapIT" its position in the English alphabet (e.g., A=1, ..., Z=26) and sum them up, we get:
S(19) + w(23) + a(1) + p(16) + I(9) + T(20) = 88
Interestingly, if you add the digits of 88, you get 16. If you then add the digits of 16, you finally get 7