670856256 has 420 divisors, whose sum is σ = 2452573200. Its totient is φ = 180278784.

The previous prime is 670856243. The next prime is 670856267. The reversal of 670856256 is 652658076.

670856256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4826235 + ... + 4826373.

It is an arithmetic number, because the mean of its divisors is an integer number (5839460).

Almost surely, 2^670856256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670856256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1226286600).

670856256 is an abundant number, since it is smaller than the sum of its proper divisors (1781716944).

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

670856256 is a wasteful number, since it uses less digits than its factorization.

670856256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 670856256 is about 25900.8929575797. The cubic root of 670856256 is about 875.4066163477.

The spelling of 670856256 in words is "six hundred seventy million, eight hundred fifty-six thousand, two hundred fifty-six".