First, I would give a lump-sum of it to my parents, as a thank you for raising and putting up with me. Maybe buy them a nice house by the lake ot send them on an all expense paid vacation.
After that, I would divide it up into multiple sums and deposit them across more than one bank. That way, if the bank gets robbed or goes under I don't lose everything. After that, I'd buy myself a nice apartment or bungalow and splurge a bit on electronics, diapers, and anything I want that makes me happy.