The number 3,066,000 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 25 28 30 35 40 42 48 50 56 60 70 73 75 80 84 100 105 112 120 125 140 146 150 168 175 200 210 219 240 250 280 292 300 336 350 365 375 400 420 438 500 511 525 560 584 600 700 730 750 840 875 876 1,000 1,022 1,050 1,095 1,168 1,200 1,400 1,460 1,500 1,533 1,680 1,750 1,752 1,825 2,000 2,044 2,100 2,190 2,555 2,625 2,800 2,920 3,000 3,066 3,500 3,504 3,650 4,088 4,200 4,380 5,110 5,250 5,475 5,840 6,000 6,132 7,000 7,300 7,665 8,176 8,400 8,760 9,125 10,220 10,500 10,950 12,264 12,775 14,000 14,600 15,330 17,520 18,250 20,440 21,000 21,900 24,528 25,550 27,375 29,200 30,660 36,500 38,325 40,880 42,000 43,800 51,100 54,750 61,320 63,875 73,000 76,650 87,600 102,200 109,500 122,640 127,750 146,000 153,300 191,625 204,400 219,000 255,500 306,600 383,250 438,000 511,000 613,200 766,500 1,022,000 1,533,000 and 3,066,000, with no remainder.
Since 3,066,000 cannot be divided by just 1 and 3,066,000, it is a composite number.