It's fun to dream!
1. Hire a tax attorney
2. Hire an accountant
3. Place determined amount 'away' to not touch and/or use for future growth/stability
4. Pay all debts of family and friends (and a few random strangers)
5. Split portion with friends/family through a trust/similar (No lump sums. Nephews/nieces would get some allocated portion, but would not have access to any of it before 18, unless approved. Nephews/nieces would get future education paid 100%.)
6. Donate to various organizations, especially science and art based
7. Create a non-profit/not-for-profit organization to help people pay off debt with no strings attached (Not sure if this would be possible, but I'd make every attempt to do it.)
8. Retire from current job and go back to school for another career