Q: Is 660,400 a Prime Number?
A: No, 660,400 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 660400 can be evenly divided by 1 2 4 5 8 10 13 16 20 25 26 40 50 52 65 80 100 104 127 130 200 208 254 260 325 400 508 520 635 650 1,016 1,040 1,270 1,300 1,651 2,032 2,540 2,600 3,175 3,302 5,080 5,200 6,350 6,604 8,255 10,160 12,700 13,208 16,510 25,400 26,416 33,020 41,275 50,800 66,040 82,550 132,080 165,100 330,200 and 660,400, with no remainder.
Since 660,400 cannot be divided by just 1 and 660,400, it is not a prime number.