A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7614360 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 18 20 24 26 30 36 39 40 45 52 60 65 72 78 90 104 117 120 130 156 180 195 234 260 312 360 390 468 520 585 780 936 1,170 1,560 1,627 2,340 3,254 4,680 4,881 6,508 8,135 9,762 13,016 14,643 16,270 19,524 21,151 24,405 29,286 32,540 39,048 42,302 48,810 58,572 63,453 65,080 73,215 84,604 97,620 105,755 117,144 126,906 146,430 169,208 190,359 195,240 211,510 253,812 292,860 317,265 380,718 423,020 507,624 585,720 634,530 761,436 846,040 951,795 1,269,060 1,522,872 1,903,590 2,538,120 3,807,180 and 7,614,360, with no remainder.
Since 7,614,360 cannot be divided by just 1 and 7,614,360, it is not a prime number.