670056 has 16 divisors (see below), whose sum is σ = 1675200. Its totient is φ = 223344.

The previous prime is 670051. The next prime is 670097. The reversal of 670056 is 650076.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 27919 = 670056 / (6 + 7 + 0 + 0 + 5 + 6).

It is not an unprimeable number, because it can be changed into a prime (670051) by changing a digit.

670056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13936 + ... + 13983.

It is an arithmetic number, because the mean of its divisors is an integer number (104700).

2⁶⁷⁰⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

670056 is an abundant number, since it is smaller than the sum of its proper divisors (1005144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670056 is a wasteful number, since it uses less digits than its factorization.

670056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27928 (or 27924 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 670056 is about 818.5694839169. The cubic root of 670056 is about 87.5058390661.

The spelling of 670056 in words is "six hundred seventy thousand, fifty-six".