A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3376800 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 25 28 30 32 35 36 40 42 45 48 50 56 60 63 67 70 72 75 80 84 90 96 100 105 112 120 126 134 140 144 150 160 168 175 180 200 201 210 224 225 240 252 268 280 288 300 315 335 336 350 360 400 402 420 450 469 480 504 525 536 560 600 603 630 670 672 700 720 800 804 840 900 938 1,005 1,008 1,050 1,072 1,120 1,200 1,206 1,260 1,340 1,400 1,407 1,440 1,575 1,608 1,675 1,680 1,800 1,876 2,010 2,016 2,100 2,144 2,345 2,400 2,412 2,520 2,680 2,800 2,814 3,015 3,150 3,216 3,350 3,360 3,600 3,752 4,020 4,200 4,221 4,690 4,824 5,025 5,040 5,360 5,600 5,628 6,030 6,300 6,432 6,700 7,035 7,200 7,504 8,040 8,400 8,442 9,380 9,648 10,050 10,080 10,720 11,256 11,725 12,060 12,600 13,400 14,070 15,008 15,075 16,080 16,800 16,884 18,760 19,296 20,100 21,105 22,512 23,450 24,120 25,200 26,800 28,140 30,150 32,160 33,768 35,175 37,520 40,200 42,210 45,024 46,900 48,240 50,400 53,600 56,280 60,300 67,536 70,350 75,040 80,400 84,420 93,800 96,480 105,525 112,560 120,600 135,072 140,700 160,800 168,840 187,600 211,050 225,120 241,200 281,400 337,680 375,200 422,100 482,400 562,800 675,360 844,200 1,125,600 1,688,400 and 3,376,800, with no remainder.
Since 3,376,800 cannot be divided by just 1 and 3,376,800, it is not a prime number.