A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7753350 can be evenly divided by 1 2 3 5 6 10 11 15 22 25 30 33 37 50 55 66 74 75 110 111 127 150 165 185 222 254 275 330 370 381 407 550 555 635 762 814 825 925 1,110 1,221 1,270 1,397 1,650 1,850 1,905 2,035 2,442 2,775 2,794 3,175 3,810 4,070 4,191 4,699 5,550 6,105 6,350 6,985 8,382 9,398 9,525 10,175 12,210 13,970 14,097 19,050 20,350 20,955 23,495 28,194 30,525 34,925 41,910 46,990 51,689 61,050 69,850 70,485 103,378 104,775 117,475 140,970 155,067 209,550 234,950 258,445 310,134 352,425 516,890 704,850 775,335 1,292,225 1,550,670 2,584,450 3,876,675 and 7,753,350, with no remainder.
Since 7,753,350 cannot be divided by just 1 and 7,753,350, it is not a prime number.