655236666 has 48 divisors (see below), whose sum is σ = 1660236864. Its totient is φ = 182855232.

The previous prime is 655236653. The next prime is 655236667. The reversal of 655236666 is 666632556.

655236666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (655236667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55051 + ... + 65886.

It is an arithmetic number, because the mean of its divisors is an integer number (34588268).

Almost surely, 2^655236666 is an apocalyptic number.

655236666 is an abundant number, since it is smaller than the sum of its proper divisors (1005000198).

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

655236666 is a wasteful number, since it uses less digits than its factorization.

655236666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120995 (or 120992 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The square root of 655236666 is about 25597.5910194690. The cubic root of 655236666 is about 868.5591449625.

The spelling of 655236666 in words is "six hundred fifty-five million, two hundred thirty-six thousand, six hundred sixty-six".