Gw mau tau 666: See 666 (number) dari 600 (nombor). Jelasin dalam bahasa melayu

667 = 23 × 29

668 = 22 × 167, tak totient

669 = 3 × 223

670 = 2 × 5 × 67, nombor sphenik, octahedral number, tak totient

671 = 11 × 61

This number is the magic constant of n×n normal magic square and n-Queens Problem for n = 11.

672 = 25 × 3 × 7, harmonic divisor number, Zuckerman number, track 5 of The Dresden Dolls.

673 nombor perdana, Proth prime

674 = 2 × 337, tak totient

675 = 33 × 52

676 = 22 × 132 = 262

677 nombor perdana, Chen prime, Eisenstein prime with no imaginary part

678 = 2 × 3 × 113, nombor sphenik, tak totient

679 = 7 × 97, sum of three consecutive primes (223 + 227 + 229), sum of nine consecutive primes (59 + 61 + 67 + 71 + 73 + 79 + 83 + 89 + 97)