659 is a prime number. It is a Sophie Germain prime because 2 x 659 + 1 = 1319 is also a prime.
0659, 2659, 3659, 5659, and 6659 are all primes.
659 and 661 form a twin prime pair.
659 is a divisor of 127 - 1.
659 is the sum of seven consecutive primes: 659 = 79 + 83 + 89 + 97 + 101 + 103 + 107.
Source: Prime Curios!