A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5547960 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 27 30 33 36 40 44 45 54 55 60 66 72 88 90 99 108 110 120 132 135 165 180 198 216 220 264 270 297 330 360 396 440 467 495 540 594 660 792 934 990 1,080 1,188 1,320 1,401 1,485 1,868 1,980 2,335 2,376 2,802 2,970 3,736 3,960 4,203 4,670 5,137 5,604 5,940 7,005 8,406 9,340 10,274 11,208 11,880 12,609 14,010 15,411 16,812 18,680 20,548 21,015 25,218 25,685 28,020 30,822 33,624 41,096 42,030 46,233 50,436 51,370 56,040 61,644 63,045 77,055 84,060 92,466 100,872 102,740 123,288 126,090 138,699 154,110 168,120 184,932 205,480 231,165 252,180 277,398 308,220 369,864 462,330 504,360 554,796 616,440 693,495 924,660 1,109,592 1,386,990 1,849,320 2,773,980 and 5,547,960, with no remainder.
Since 5,547,960 cannot be divided by just 1 and 5,547,960, it is not a prime number.