A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6901180 can be evenly divided by 1 2 4 5 10 11 13 19 20 22 26 38 44 52 55 65 76 95 110 127 130 143 190 209 220 247 254 260 286 380 418 494 508 572 635 715 836 988 1,045 1,235 1,270 1,397 1,430 1,651 2,090 2,413 2,470 2,540 2,717 2,794 2,860 3,302 4,180 4,826 4,940 5,434 5,588 6,604 6,985 8,255 9,652 10,868 12,065 13,585 13,970 16,510 18,161 24,130 26,543 27,170 27,940 31,369 33,020 36,322 48,260 53,086 54,340 62,738 72,644 90,805 106,172 125,476 132,715 156,845 181,610 265,430 313,690 345,059 363,220 530,860 627,380 690,118 1,380,236 1,725,295 3,450,590 and 6,901,180, with no remainder.
Since 6,901,180 cannot be divided by just 1 and 6,901,180, it is not a prime number.