A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8496600 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 17 20 21 24 25 28 30 34 35 40 42 49 50 51 56 60 68 70 75 84 85 98 100 102 105 119 120 136 140 147 150 168 170 175 196 200 204 210 238 245 255 280 289 294 300 340 350 357 392 408 420 425 476 490 510 525 578 588 595 600 680 700 714 735 833 840 850 867 952 980 1,020 1,050 1,156 1,176 1,190 1,225 1,275 1,400 1,428 1,445 1,470 1,666 1,700 1,734 1,785 1,960 2,023 2,040 2,100 2,312 2,380 2,450 2,499 2,550 2,856 2,890 2,940 2,975 3,332 3,400 3,468 3,570 3,675 4,046 4,165 4,200 4,335 4,760 4,900 4,998 5,100 5,780 5,880 5,950 6,069 6,664 6,936 7,140 7,225 7,350 8,092 8,330 8,670 8,925 9,800 9,996 10,115 10,200 11,560 11,900 12,138 12,495 14,161 14,280 14,450 14,700 16,184 16,660 17,340 17,850 19,992 20,230 20,825 21,675 23,800 24,276 24,990 28,322 28,900 29,400 30,345 33,320 34,680 35,700 40,460 41,650 42,483 43,350 48,552 49,980 50,575 56,644 57,800 60,690 62,475 70,805 71,400 80,920 83,300 84,966 86,700 99,960 101,150 113,288 121,380 124,950 141,610 151,725 166,600 169,932 173,400 202,300 212,415 242,760 249,900 283,220 303,450 339,864 354,025 404,600 424,830 499,800 566,440 606,900 708,050 849,660 1,062,075 1,213,800 1,416,100 1,699,320 2,124,150 2,832,200 4,248,300 and 8,496,600, with no remainder.
Since 8,496,600 cannot be divided by just 1 and 8,496,600, it is not a prime number.