A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4996800 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 32 36 40 45 48 50 60 64 72 75 80 90 96 100 120 144 150 160 180 192 200 225 240 288 300 320 347 360 400 450 480 576 600 694 720 800 900 960 1,041 1,200 1,388 1,440 1,600 1,735 1,800 2,082 2,400 2,776 2,880 3,123 3,470 3,600 4,164 4,800 5,205 5,552 6,246 6,940 7,200 8,328 8,675 10,410 11,104 12,492 13,880 14,400 15,615 16,656 17,350 20,820 22,208 24,984 26,025 27,760 31,230 33,312 34,700 41,640 49,968 52,050 55,520 62,460 66,624 69,400 78,075 83,280 99,936 104,100 111,040 124,920 138,800 156,150 166,560 199,872 208,200 249,840 277,600 312,300 333,120 416,400 499,680 555,200 624,600 832,800 999,360 1,249,200 1,665,600 2,498,400 and 4,996,800, with no remainder.
Since 4,996,800 cannot be divided by just 1 and 4,996,800, it is not a prime number.