Jim Fixx, the famous runner, dropped dead of a heart attack. Euell Gibbons, of Stalking the Wild Asparagus, ditto.
You cannot beat genes, although some modern medicines are helping.
As for retiring at 62, one caution - if you work, even free-lance or part-time, the amount of money you ear will be deducted from your SS check. If you tough it out to 66, you can work and earn $100k a year and you still get your full SS amount.