A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5780060 can be evenly divided by 1 2 4 5 10 11 13 20 22 26 43 44 47 52 55 65 86 94 110 130 143 172 188 215 220 235 260 286 430 470 473 517 559 572 611 715 860 940 946 1,034 1,118 1,222 1,430 1,892 2,021 2,068 2,236 2,365 2,444 2,585 2,795 2,860 3,055 4,042 4,730 5,170 5,590 6,110 6,149 6,721 8,084 9,460 10,105 10,340 11,180 12,220 12,298 13,442 20,210 22,231 24,596 26,273 26,884 30,745 33,605 40,420 44,462 52,546 61,490 67,210 88,924 105,092 111,155 122,980 131,365 134,420 222,310 262,730 289,003 444,620 525,460 578,006 1,156,012 1,445,015 2,890,030 and 5,780,060, with no remainder.
Since 5,780,060 cannot be divided by just 1 and 5,780,060, it is not a prime number.