Hard to say what I would do with it. Help as many people as I could I guess. I've always thought that there should be a limit on how much you can win or more winners should be picked. If you took the 640 mil and made it so each winner got 15 mil after taxes that would make like 21 millionaires. Especially with the state of our economy, many winners would help out more than just one. That's 21 times as many houses, cars, boats, planes, vacations, and other big ticket items that would be bought instead of just one new Carribean island known as Jerome Isle. I know it's all random, but somehow it could be done. Besides, if there was more of a chance to win then more people would play. I don't know, just a thought.