Gw mau tau 680-an dari 600 (nombor). Jelasin dalam bahasa melayu

680 = 23 × 5 × 17, tetrahedral number, tak totient

681 = 3 × 227, nombor pentagon berpusat

682 = 2 × 11 × 31, nombor sphenik, sum of four consecutive primes (163 + 167 + 173 + 179), sum of ten consecutive primes (47 + 53 + 59 + 61 + 67 + 71 + 73 + 79 + 83 + 89)

683 nombor perdana, Sophie Germain prime, sum of five consecutive primes (127 + 131 + 137 + 139 + 149), Chen prime, Eisenstein prime with no imaginary part, Wagstaff prime

684 = 22 × 32 × 19, nombor Harshad

685 = 5 × 137, centered square number

686 = 2 × 73, tak totient,

The code for international direct dial phone calls to Kiribati.

686 is name of company for snowboarding apparel.

687 = 3 × 229

688 = 24 × 43, Friedman number since 688 = 8 × 86

689 = 13 × 53, sum of three consecutive primes (227 + 229 + 233), sum of seven consecutive primes (83 + 89 + 97 + 101 + 103 + 107 + 109)