655664766 has 32 divisors (see below), whose sum is σ = 1330483200. Its totient is φ = 215373600.

The previous prime is 655664719. The next prime is 655664777. The reversal of 655664766 is 667466556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335091 + ... + 337041.

It is an arithmetic number, because the mean of its divisors is an integer number (41577600).

Almost surely, 2^655664766 is an apocalyptic number.

655664766 is an abundant number, since it is smaller than the sum of its proper divisors (674818434).

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

655664766 is a wasteful number, since it uses less digits than its factorization.

655664766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744.

The product of its digits is 5443200, while the sum is 51.

The square root of 655664766 is about 25605.9517690712. The cubic root of 655664766 is about 868.7482619843.

The spelling of 655664766 in words is "six hundred fifty-five million, six hundred sixty-four thousand, seven hundred sixty-six".