667650656 has 24 divisors (see below), whose sum is σ = 1391758200. Its totient is φ = 314188288.

The previous prime is 667650653. The next prime is 667650679. The reversal of 667650656 is 656056766.

It is a self number, because there is not a number n which added to its sum of digits gives 667650656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667650653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613106 + ... + 614193.

It is an arithmetic number, because the mean of its divisors is an integer number (57989925).

Almost surely, 2^667650656 is an apocalyptic number.

It is an amenable number.

667650656 is an abundant number, since it is smaller than the sum of its proper divisors (724107544).

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

667650656 is a wasteful number, since it uses less digits than its factorization.

667650656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227326 (or 1227318 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 47.

The square root of 667650656 is about 25838.9368202331. The cubic root of 667650656 is about 874.0100503813.

The spelling of 667650656 in words is "six hundred sixty-seven million, six hundred fifty thousand, six hundred fifty-six".