Good luck finding 3% interest nowdays... BTW, if I am not mistaken, with lottery winnings you can take "lump sum" which is 60% of the won sum or the whole amount as spread payments over a number of years. You are always better off taking the lump sum of around 25mil, then substract 1/2 in taxes - thats around 12 mil. Certainly will give you social independence, pay for college for your kids and let you travel but not an amount that you could live like a king. I've also heard several stories of (previously poor) ppl winning lottery and spending it all in a matter of few years.
Careful investment would preserve your capital, for sure...