“I’ve always said that if I ever won the lottery, the first thing I’d do is ditch my phone and live incognito for a month or so until I could sort out a way forward.”
I know of a couple that won $45 million in the Virginia lottery. It took them some time to claim their winnings but when they did they had already seen a lawyer and an accountant. They were determined they wouldn’t end up broke like so many other lottery winners.
Smart folks I think.
It takes a bit of discipline but my advice will be to keep it to yourself and go on living your normal life for at least a month or two while you get your financial house in order. Get all your debt paid off (including your mortgage) and work with a trusted financial person to put all that money into a diversified portfolio of equities and bonds (allocation depending on age). What you want to do is to ensure that you will not have to worry about money for the rest of your life.
I would highly recommend holding off on major purchases like homes, cars, boats, etc. Definitely get a new phone and phone number and don't give your number to anybody you don't totally trust. Take a long vacation to a secluded spot where you will have time to think without the distraction of a hundred phone calls a day (which you will get otherwise).