A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6066060 can be evenly divided by 1 2 3 4 5 6 7 10 11 12 13 14 15 20 21 22 26 28 30 33 35 39 42 44 52 55 60 65 66 70 77 78 84 91 101 105 110 130 132 140 143 154 156 165 182 195 202 210 220 231 260 273 286 303 308 330 364 385 390 404 420 429 455 462 505 546 572 606 660 707 715 770 780 858 910 924 1,001 1,010 1,092 1,111 1,155 1,212 1,313 1,365 1,414 1,430 1,515 1,540 1,716 1,820 2,002 2,020 2,121 2,145 2,222 2,310 2,626 2,730 2,828 2,860 3,003 3,030 3,333 3,535 3,939 4,004 4,242 4,290 4,444 4,620 5,005 5,252 5,460 5,555 6,006 6,060 6,565 6,666 7,070 7,777 7,878 8,484 8,580 9,191 10,010 10,605 11,110 12,012 13,130 13,332 14,140 14,443 15,015 15,554 15,756 16,665 18,382 19,695 20,020 21,210 22,220 23,331 26,260 27,573 28,886 30,030 31,108 33,330 36,764 38,885 39,390 42,420 43,329 45,955 46,662 55,146 57,772 60,060 66,660 72,215 77,770 78,780 86,658 91,910 93,324 101,101 110,292 116,655 137,865 144,430 155,540 173,316 183,820 202,202 216,645 233,310 275,730 288,860 303,303 404,404 433,290 466,620 505,505 551,460 606,606 866,580 1,011,010 1,213,212 1,516,515 2,022,020 3,033,030 and 6,066,060, with no remainder.
Since 6,066,060 cannot be divided by just 1 and 6,066,060, it is not a prime number.