Gw mau tau 660-an dari 600 (nombor). Jelasin dalam bahasa melayu

660 = 22 × 3 × 5 × 11, sum of four consecutive primes (157 + 163 + 167 + 173), sum of six consecutive primes (101 + 103 + 107 + 109 + 113 + 127), sum of eight consecutive primes (67 + 71 + 73 + 79 + 83 + 89 + 97 + 101), sparsely totient number, nombor Harshad

661 nombor perdana, sum of three consecutive primes (211 + 223 + 227), fungsi Mertens sets new low of -11 which stands until 665, star number

662 = 2 × 331, tak totient, member of Mian-Chowla sequence

663 = 3 × 13 × 17, nombor sphenik, Smith number

664 = 23 × 83

665 = 5 × 7 × 19, nombor sphenik, fungsi Mertens sets new low of -12 which stands until 1105