A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5847660 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 13 14 15 17 18 20 21 26 27 28 30 34 35 36 39 42 45 49 51 52 54 60 63 65 68 70 78 84 85 90 91 98 102 105 108 117 119 126 130 135 140 147 153 156 170 180 182 189 195 196 204 210 221 234 238 245 252 255 260 270 273 294 306 315 340 351 357 364 378 390 420 441 442 455 459 468 476 490 510 540 546 585 588 595 612 630 637 663 702 714 735 756 765 780 819 833 882 884 910 918 945 980 1,020 1,071 1,092 1,105 1,170 1,190 1,260 1,274 1,323 1,326 1,365 1,404 1,428 1,470 1,530 1,547 1,638 1,666 1,755 1,764 1,785 1,820 1,836 1,890 1,911 1,989 2,142 2,205 2,210 2,295 2,340 2,380 2,457 2,499 2,548 2,646 2,652 2,730 2,940 3,060 3,094 3,185 3,213 3,276 3,315 3,332 3,510 3,570 3,780 3,822 3,978 4,095 4,165 4,284 4,410 4,420 4,590 4,641 4,914 4,998 5,292 5,355 5,460 5,733 5,967 6,188 6,370 6,426 6,615 6,630 7,020 7,140 7,497 7,644 7,735 7,956 8,190 8,330 8,820 9,180 9,282 9,555 9,828 9,945 9,996 10,710 10,829 11,466 11,934 12,285 12,495 12,740 12,852 13,230 13,260 13,923 14,994 15,470 16,065 16,380 16,660 17,199 18,564 19,110 19,890 21,420 21,658 22,491 22,932 23,205 23,868 24,570 24,990 26,460 27,846 28,665 29,835 29,988 30,940 32,130 32,487 34,398 37,485 38,220 39,780 41,769 43,316 44,982 46,410 49,140 49,980 54,145 55,692 57,330 59,670 64,260 64,974 68,796 69,615 74,970 83,538 85,995 89,964 92,820 97,461 108,290 112,455 114,660 119,340 129,948 139,230 149,940 162,435 167,076 171,990 194,922 208,845 216,580 224,910 278,460 292,383 324,870 343,980 389,844 417,690 449,820 487,305 584,766 649,740 835,380 974,610 1,169,532 1,461,915 1,949,220 2,923,830 and 5,847,660, with no remainder.
Since 5,847,660 cannot be divided by just 1 and 5,847,660, it is not a prime number.