667472656 has 20 divisors (see below), whose sum is σ = 1334946304. Its totient is φ = 322970400.

The previous prime is 667472639. The next prime is 667472657. The reversal of 667472656 is 656274766.

667472656 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (667472657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672360 + ... + 673351.

Almost surely, 2^667472656 is an apocalyptic number.

It is an amenable number.

667472656 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

667472656 is a wasteful number, since it uses less digits than its factorization.

667472656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345750 (or 1345744 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 49.

The square root of 667472656 is about 25835.4921764614. The cubic root of 667472656 is about 873.9323712261.

The spelling of 667472656 in words is "six hundred sixty-seven million, four hundred seventy-two thousand, six hundred fifty-six".