670585656 has 64 divisors (see below), whose sum is σ = 1812827520. Its totient is φ = 205488000.

The previous prime is 670585651. The next prime is 670585679. The reversal of 670585656 is 656585076.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670585651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74031 + ... + 82593.

It is an arithmetic number, because the mean of its divisors is an integer number (28325430).

Almost surely, 2^670585656 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 670585656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906413760).

670585656 is an abundant number, since it is smaller than the sum of its proper divisors (1142241864).

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

670585656 is a wasteful number, since it uses less digits than its factorization.

670585656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836 (or 8832 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 48.

The square root of 670585656 is about 25895.6686725792. The cubic root of 670585656 is about 875.2888976929.

The spelling of 670585656 in words is "six hundred seventy million, five hundred eighty-five thousand, six hundred fifty-six".