$257,000,000 ($275 million) or $275,000?
$275 million - After taxes (which would be nearly 50%) you'd still have $150 million or so. I'd retire and I'd ensure my parents and in-laws homes and debts were paid, and that we had enough $$ set aside for DS's college education. Then I'd invest the rest and live off the interest, and donate a lot to charity.
$275,000? After taxes, around $150,000, well, I'd pay off debt, take a great vacation w/ family, then invest the rest. But I'd still probably have to work!