A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6722100 can be evenly divided by 1 2 3 4 5 6 7 9 10 11 12 14 15 18 20 21 22 25 28 30 33 35 36 42 44 45 50 55 60 63 66 70 75 77 84 90 97 99 100 105 110 126 132 140 150 154 165 175 180 194 198 210 220 225 231 252 275 291 300 308 315 330 350 385 388 396 420 450 462 485 495 525 550 582 630 660 679 693 700 770 825 873 900 924 970 990 1,050 1,067 1,100 1,155 1,164 1,260 1,358 1,386 1,455 1,540 1,575 1,650 1,746 1,925 1,940 1,980 2,037 2,100 2,134 2,310 2,425 2,475 2,716 2,772 2,910 3,150 3,201 3,300 3,395 3,465 3,492 3,850 4,074 4,268 4,365 4,620 4,850 4,950 5,335 5,775 5,820 6,111 6,300 6,402 6,790 6,930 7,275 7,469 7,700 8,148 8,730 9,603 9,700 9,900 10,185 10,670 11,550 12,222 12,804 13,580 13,860 14,550 14,938 16,005 16,975 17,325 17,460 19,206 20,370 21,340 21,825 22,407 23,100 24,444 26,675 29,100 29,876 30,555 32,010 33,950 34,650 37,345 38,412 40,740 43,650 44,814 48,015 50,925 53,350 61,110 64,020 67,221 67,900 69,300 74,690 80,025 87,300 89,628 96,030 101,850 106,700 112,035 122,220 134,442 149,380 152,775 160,050 186,725 192,060 203,700 224,070 240,075 268,884 305,550 320,100 336,105 373,450 448,140 480,150 560,175 611,100 672,210 746,900 960,300 1,120,350 1,344,420 1,680,525 2,240,700 3,361,050 and 6,722,100, with no remainder.
Since 6,722,100 cannot be divided by just 1 and 6,722,100, it is not a prime number.