A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7477110 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 27 30 34 45 51 54 81 85 90 102 135 153 162 170 181 243 255 270 306 362 405 459 486 510 543 765 810 905 918 1,086 1,215 1,377 1,530 1,629 1,810 2,295 2,430 2,715 2,754 3,077 3,258 4,131 4,590 4,887 5,430 6,154 6,885 8,145 8,262 9,231 9,774 13,770 14,661 15,385 16,290 18,462 20,655 24,435 27,693 29,322 30,770 41,310 43,983 46,155 48,870 55,386 73,305 83,079 87,966 92,310 138,465 146,610 166,158 219,915 249,237 276,930 415,395 439,830 498,474 747,711 830,790 1,246,185 1,495,422 2,492,370 3,738,555 and 7,477,110, with no remainder.
Since 7,477,110 cannot be divided by just 1 and 7,477,110, it is not a prime number.