You'd certainly don't want to put it all in one bank account. You have to spread it out over several different banks/investments/securities etc. You'd most undoubtedly need help, but the question would be who. You'd want the best advice possible without getting screwed over. And that's the most important decision you have to make because the sharks will be out to try and take advantage and get a piece.
It would take a team of a lawyer/estate planner, CPA, and investment manager. You'd want to meet with all three separately and then together (once you've made your decision) and get the most reputable possible doing a lot of work on checking reference and not being as concerned with what they will charge (you certainly don't want to go cheep to save money and then get screwed over). Also, all three should come from different companies so that your advice isn't just coming from one brain trust. Come up with a plan to spread out the money making sure you have enough liquid for the short term and having a plan for the rest. Most likely set up a trust. Then go to the lottery office and claim you check.
Yes, I've thought about this because I will win the $550 million dollar powerball jackpot. :hihi: