Take off $10M for doing some of the things mentioned above - clearing debts, a few choice properties, cars - and leave at least $1M for a straight up donation to charity.
Put half of it into a 5% interest bearing savings account, and half invested diversely but a bit more aggressively. So you get about $38,500 per week in interest. Again, send $6,000 of that to family and friends, and $2,500 to charity.
That leaves at least $30,000 per week - I'd say you could probably live off that, while nursing the other investments as well.