A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5510754 can be evenly divided by 1 2 3 6 9 17 18 23 27 29 34 46 51 54 58 69 81 87 102 138 153 162 174 207 243 261 306 391 414 459 486 493 522 621 667 782 783 918 986 1,173 1,242 1,334 1,377 1,479 1,566 1,863 2,001 2,346 2,349 2,754 2,958 3,519 3,726 4,002 4,131 4,437 4,698 5,589 6,003 7,038 7,047 8,262 8,874 10,557 11,178 11,339 12,006 13,311 14,094 18,009 21,114 22,678 26,622 31,671 34,017 36,018 39,933 54,027 63,342 68,034 79,866 95,013 102,051 108,054 119,799 162,081 190,026 204,102 239,598 306,153 324,162 612,306 918,459 1,836,918 2,755,377 and 5,510,754, with no remainder.
Since 5,510,754 cannot be divided by just 1 and 5,510,754, it is not a prime number.