Q: Is 816,660 a Prime Number?
A: No, 816,660 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 816660 can be evenly divided by 1 2 3 4 5 6 9 10 12 13 15 18 20 26 30 36 39 45 52 60 65 78 90 117 130 156 180 195 234 260 349 390 468 585 698 780 1,047 1,170 1,396 1,745 2,094 2,340 3,141 3,490 4,188 4,537 5,235 6,282 6,980 9,074 10,470 12,564 13,611 15,705 18,148 20,940 22,685 27,222 31,410 40,833 45,370 54,444 62,820 68,055 81,666 90,740 136,110 163,332 204,165 272,220 408,330 and 816,660, with no remainder.
Since 816,660 cannot be divided by just 1 and 816,660, it is not a prime number.