Pay off debts, obviously. That would eat only an utterly miniscule amount. Buy some property and build a house that works for us. Definitely give to some charities and organizations (yes, FR included). I’d also pay off debts for my family members (LEGITIMATE family members, not ‘long-lost Cousin Earl from Ottumwa’ who needs oh, only a couple million or ten...).
Beyond that, I don’t know.
You have to look out for those ‘long lost cousins’. They (real and fake) will be after you BigTime ;-)
We want to build a house somewhere in the sticks, with land to grow veggies and flowers; maybe have some livestock.
We’d also like to set up a research grant at some university for study of geriatric issues - we loved our Grandmothers.
Hillsdale, Fisher House, Salvation Army are on our list...and we’re still thinking.
It’s a very fun exercise :-)