666563136 has 56 divisors (see below), whose sum is σ = 1765730784. Its totient is φ = 221921280.

The previous prime is 666563087. The next prime is 666563141. The reversal of 666563136 is 631365666.

666563136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219871 + ... + 222881.

Almost surely, 2^666563136 is an apocalyptic number.

It is an amenable number.

666563136 is an abundant number, since it is smaller than the sum of its proper divisors (1099167648).

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

666563136 is a wasteful number, since it uses less digits than its factorization.

666563136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179 (or 4169 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 666563136 is about 25817.8840341342. The cubic root of 666563136 is about 873.5352412113.

The spelling of 666563136 in words is "six hundred sixty-six million, five hundred sixty-three thousand, one hundred thirty-six".