A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8346800 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 25 28 35 40 44 50 55 56 70 77 80 88 100 110 112 140 154 175 176 200 220 271 275 280 308 350 385 400 440 542 550 560 616 700 770 880 1,084 1,100 1,232 1,355 1,400 1,540 1,897 1,925 2,168 2,200 2,710 2,800 2,981 3,080 3,794 3,850 4,336 4,400 5,420 5,962 6,160 6,775 7,588 7,700 9,485 10,840 11,924 13,550 14,905 15,176 15,400 18,970 20,867 21,680 23,848 27,100 29,810 30,352 30,800 37,940 41,734 47,425 47,696 54,200 59,620 74,525 75,880 83,468 94,850 104,335 108,400 119,240 149,050 151,760 166,936 189,700 208,670 238,480 298,100 333,872 379,400 417,340 521,675 596,200 758,800 834,680 1,043,350 1,192,400 1,669,360 2,086,700 4,173,400 and 8,346,800, with no remainder.
Since 8,346,800 cannot be divided by just 1 and 8,346,800, it is not a prime number.