Creating long-term benefits from your winnings
Contact a reputable accountant or financial advisor. You will want to do this before spending any money. They will help you weigh all possible options and give you the best possible counsel for managing your winnings.
Your financial advisor will discuss with you a plan for how much money to spend versus to save, whether to invest your money and where, along with projections like when you can expect to retire.
Consider a private bank and private banker just for your lottery and have the proceeds of your investing deposited in your regular savings account, moving the money to checking as needed.
Set up a trust at your private bank for your children and grandchildren to draw from.