6659 has 2 divisors, whose sum is σ = 6660.
Its totient is φ = 6658.
The previous prime is 6653. The next prime is 6661. The reversal of 6659 is 9566.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-6659 is a prime.
Together with 6661, it forms a pair of twin primes.
It is a Chen prime.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 6659.
It is not a weakly prime, because it can be changed into another prime (6653) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329 + 3330.
It is an arithmetic number, because the mean of its divisors is an integer number (3330).
26659 is an apocalyptic number.
6659 is a deficient number, since it is larger than the sum of its proper divisors (1).
6659 is an equidigital number, since it uses as much as digits as its factorization.
6659 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1620, while the sum is 26.
The square root of 6659 is about 81.6026960339.
The cubic root of 6659 is about 18.8135032007.
It can be divided in two parts, 66 and 59, that added together give a cube (125 = 53).
The spelling of 6659 in words is "six thousand, six hundred fifty-nine".