Q: Is 720,720 a Prime Number?
A: No, 720,720 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 720720 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 20 21 22 24 26 28 30 33 35 36 39 40 42 44 45 48 52 55 56 60 63 65 66 70 72 77 78 80 84 88 90 91 99 104 105 110 112 117 120 126 130 132 140 143 144 154 156 165 168 176 180 182 195 198 208 210 220 231 234 240 252 260 264 273 280 286 308 312 315 330 336 360 364 385 390 396 420 429 440 455 462 468 495 504 520 528 546 560 572 585 616 624 630 660 693 715 720 728 770 780 792 819 840 858 880 910 924 936 990 1,001 1,008 1,040 1,092 1,144 1,155 1,170 1,232 1,260 1,287 1,320 1,365 1,386 1,430 1,456 1,540 1,560 1,584 1,638 1,680 1,716 1,820 1,848 1,872 1,980 2,002 2,145 2,184 2,288 2,310 2,340 2,520 2,574 2,640 2,730 2,772 2,860 3,003 3,080 3,120 3,276 3,432 3,465 3,640 3,696 3,960 4,004 4,095 4,290 4,368 4,620 4,680 5,005 5,040 5,148 5,460 5,544 5,720 6,006 6,160 6,435 6,552 6,864 6,930 7,280 7,920 8,008 8,190 8,580 9,009 9,240 9,360 10,010 10,296 10,920 11,088 11,440 12,012 12,870 13,104 13,860 15,015 16,016 16,380 17,160 18,018 18,480 20,020 20,592 21,840 24,024 25,740 27,720 30,030 32,760 34,320 36,036 40,040 45,045 48,048 51,480 55,440 60,060 65,520 72,072 80,080 90,090 102,960 120,120 144,144 180,180 240,240 360,360 and 720,720, with no remainder.
Since 720,720 cannot be divided by just 1 and 720,720, it is not a prime number.