670659 has 8 divisors (see below), whose sum is σ = 975552. Its totient is φ = 406440.

The previous prime is 670639. The next prime is 670669. The reversal of 670659 is 956076.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 670659 - 2⁵ = 670627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20323 = 670659 / (6 + 7 + 0 + 6 + 5 + 9).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670659.

It is not an unprimeable number, because it can be changed into a prime (670619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10129 + ... + 10194.

It is an arithmetic number, because the mean of its divisors is an integer number (121944).

2⁶⁷⁰⁶⁵⁹ is an apocalyptic number.

670659 is a deficient number, since it is larger than the sum of its proper divisors (304893).

670659 is a wasteful number, since it uses less digits than its factorization.

670659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20337.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 670659 is about 818.9377265702. The cubic root of 670659 is about 87.5320807536.

The spelling of 670659 in words is "six hundred seventy thousand, six hundred fifty-nine".