Q: Is 266,640 a Prime Number?
A: No, 266,640 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 266640 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 33 40 44 48 55 60 66 80 88 101 110 120 132 165 176 202 220 240 264 303 330 404 440 505 528 606 660 808 880 1,010 1,111 1,212 1,320 1,515 1,616 2,020 2,222 2,424 2,640 3,030 3,333 4,040 4,444 4,848 5,555 6,060 6,666 8,080 8,888 11,110 12,120 13,332 16,665 17,776 22,220 24,240 26,664 33,330 44,440 53,328 66,660 88,880 133,320 and 266,640, with no remainder.
Since 266,640 cannot be divided by just 1 and 266,640, it is not a prime number.