A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8877180 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 19 20 26 30 38 39 52 57 60 65 76 78 95 114 130 156 190 195 228 247 260 285 380 390 494 570 599 741 780 988 1,140 1,198 1,235 1,482 1,797 2,396 2,470 2,964 2,995 3,594 3,705 4,940 5,990 7,188 7,410 7,787 8,985 11,381 11,980 14,820 15,574 17,970 22,762 23,361 31,148 34,143 35,940 38,935 45,524 46,722 56,905 68,286 77,870 93,444 113,810 116,805 136,572 147,953 155,740 170,715 227,620 233,610 295,906 341,430 443,859 467,220 591,812 682,860 739,765 887,718 1,479,530 1,775,436 2,219,295 2,959,060 4,438,590 and 8,877,180, with no remainder.
Since 8,877,180 cannot be divided by just 1 and 8,877,180, it is not a prime number.