A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6607062 can be evenly divided by 1 2 3 6 7 9 11 14 18 21 22 27 33 42 49 54 63 66 77 98 99 126 147 154 189 198 227 231 294 297 378 441 454 462 539 594 681 693 882 1,078 1,323 1,362 1,386 1,589 1,617 2,043 2,079 2,497 2,646 3,178 3,234 4,086 4,158 4,767 4,851 4,994 6,129 7,491 9,534 9,702 11,123 12,258 14,301 14,553 14,982 17,479 22,246 22,473 28,602 29,106 33,369 34,958 42,903 44,946 52,437 66,738 67,419 85,806 100,107 104,874 122,353 134,838 157,311 200,214 244,706 300,321 314,622 367,059 471,933 600,642 734,118 943,866 1,101,177 2,202,354 3,303,531 and 6,607,062, with no remainder.
Since 6,607,062 cannot be divided by just 1 and 6,607,062, it is not a prime number.