That much money? Basically, forever?
After settling money problems for family and friends, new stuff (houses, cars, clothes that are tailored to fit, someone to do all the cooking--of healthy stuff--and cleaning), membership to Club 33 at Disneyland, yadda yadda yadda...
...it sounds like I'd be like a lot of people here: giving a lot of money away.
Infrastructure always needs to be fixed--and not with some cheap crap asphalt "paint" but REAL concrete roadbeds. Bridges, etc.
Educational programs that would hopefully teach people how to strive for more--in an honest fashion. If gangs are a problem, provide an alternative future for those kids; and protect those trying from those whose pleasure it is to prey on them. Also museums and exhibits so that people can see what exists beyond their neighborhood, and that people are similar all over.
Money for schools to be brought into the 21st century, college funds and schools for those who don't want/need college for what they want to do, like trade schools. People need tree trimmers, repairmen, plumbers, computer help, people who know what they're doing and there are people who'd rather do that than go to college. So programs to teach those skills and the skills to run a business, with financial advise and business support to keep their small businesses afloat.
Get new energy sources and reclaim land that has been despoiled. Programs to help endangered animals.
On the totally negative side...have a hit squad to take out rapists and child molesters (and extreme abusers), after total confirmation so no innocents or ambiguous cases are included--you said there'd be money, so I assume there'd also be time for confirmation. And of course, programs to help the victims.
Have a team to uncover the seedy businessmen and politicians and expose them to shame--and removing all unjust enrichment they have received. And extended to those family members who knew the source of the money they themselves spent and didn't care, as long as life was good for them.
Yeah, I'm kinda liking revenge.