667706256 has 60 divisors (see below), whose sum is σ = 2135603392. Its totient is φ = 190772928.

The previous prime is 667706251. The next prime is 667706287. The reversal of 667706256 is 652607766.

It is not an unprimeable number, because it can be changed into a prime (667706251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330196 + ... + 332211.

Almost surely, 2^667706256 is an apocalyptic number.

It is an amenable number.

667706256 is an abundant number, since it is smaller than the sum of its proper divisors (1467897136).

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

667706256 is a wasteful number, since it uses less digits than its factorization.

667706256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662428 (or 662419 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The square root of 667706256 is about 25840.0126934953. The cubic root of 667706256 is about 874.0343113774.

The spelling of 667706256 in words is "six hundred sixty-seven million, seven hundred six thousand, two hundred fifty-six".