A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4886700 can be evenly divided by 1 2 3 4 5 6 7 10 12 13 14 15 20 21 25 26 28 30 35 39 42 50 52 60 65 70 75 78 84 91 100 105 130 140 150 156 175 179 182 195 210 260 273 300 325 350 358 364 390 420 455 525 537 546 650 700 716 780 895 910 975 1,050 1,074 1,092 1,253 1,300 1,365 1,790 1,820 1,950 2,100 2,148 2,275 2,327 2,506 2,685 2,730 3,580 3,759 3,900 4,475 4,550 4,654 5,012 5,370 5,460 6,265 6,825 6,981 7,518 8,950 9,100 9,308 10,740 11,635 12,530 13,425 13,650 13,962 15,036 16,289 17,900 18,795 23,270 25,060 26,850 27,300 27,924 31,325 32,578 34,905 37,590 46,540 48,867 53,700 58,175 62,650 65,156 69,810 75,180 81,445 93,975 97,734 116,350 125,300 139,620 162,890 174,525 187,950 195,468 232,700 244,335 325,780 349,050 375,900 407,225 488,670 698,100 814,450 977,340 1,221,675 1,628,900 2,443,350 and 4,886,700, with no remainder.
Since 4,886,700 cannot be divided by just 1 and 4,886,700, it is not a prime number.