A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4657800 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 25 28 30 35 40 42 50 56 60 70 75 84 100 105 120 140 150 168 175 200 210 280 300 350 420 525 600 700 840 1,050 1,109 1,400 2,100 2,218 3,327 4,200 4,436 5,545 6,654 7,763 8,872 11,090 13,308 15,526 16,635 22,180 23,289 26,616 27,725 31,052 33,270 38,815 44,360 46,578 55,450 62,104 66,540 77,630 83,175 93,156 110,900 116,445 133,080 155,260 166,350 186,312 194,075 221,800 232,890 310,520 332,700 388,150 465,780 582,225 665,400 776,300 931,560 1,164,450 1,552,600 2,328,900 and 4,657,800, with no remainder.
Since 4,657,800 cannot be divided by just 1 and 4,657,800, it is not a prime number.