A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6079590 can be evenly divided by 1 2 3 5 6 9 10 11 15 18 22 23 27 30 33 45 46 54 55 66 69 89 90 99 110 115 135 138 165 178 198 207 230 253 267 270 297 330 345 414 445 495 506 534 594 621 690 759 801 890 979 990 1,035 1,242 1,265 1,335 1,485 1,518 1,602 1,958 2,047 2,070 2,277 2,403 2,530 2,670 2,937 2,970 3,105 3,795 4,005 4,094 4,554 4,806 4,895 5,874 6,141 6,210 6,831 7,590 8,010 8,811 9,790 10,235 11,385 12,015 12,282 13,662 14,685 17,622 18,423 20,470 22,517 22,770 24,030 26,433 29,370 30,705 34,155 36,846 44,055 45,034 52,866 55,269 61,410 67,551 68,310 88,110 92,115 110,538 112,585 132,165 135,102 184,230 202,653 225,170 264,330 276,345 337,755 405,306 552,690 607,959 675,510 1,013,265 1,215,918 2,026,530 3,039,795 and 6,079,590, with no remainder.
Since 6,079,590 cannot be divided by just 1 and 6,079,590, it is not a prime number.