A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3350088 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 17 18 21 23 24 28 34 36 42 46 51 56 63 68 69 72 84 92 102 119 126 136 138 153 161 168 184 204 207 238 252 276 289 306 322 357 391 408 414 476 483 504 552 578 612 644 714 782 828 867 952 966 1,071 1,156 1,173 1,224 1,288 1,428 1,449 1,564 1,656 1,734 1,932 2,023 2,142 2,312 2,346 2,601 2,737 2,856 2,898 3,128 3,468 3,519 3,864 4,046 4,284 4,692 5,202 5,474 5,796 6,069 6,647 6,936 7,038 8,092 8,211 8,568 9,384 10,404 10,948 11,592 12,138 13,294 14,076 16,184 16,422 18,207 19,941 20,808 21,896 24,276 24,633 26,588 28,152 32,844 36,414 39,882 46,529 48,552 49,266 53,176 59,823 65,688 72,828 79,764 93,058 98,532 119,646 139,587 145,656 159,528 186,116 197,064 239,292 279,174 372,232 418,761 478,584 558,348 837,522 1,116,696 1,675,044 and 3,350,088, with no remainder.
Since 3,350,088 cannot be divided by just 1 and 3,350,088, it is not a prime number.