66589164 has 18 divisors (see below), whose sum is σ = 168322700. Its totient is φ = 22196376.

The previous prime is 66589151. The next prime is 66589169. The reversal of 66589164 is 46198566.

66589164 is a `hidden beast` number, since 6 + 6 + 589 + 1 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (66589169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 924814 + ... + 924885.

Almost surely, 2^66589164 is an apocalyptic number.

It is an amenable number.

66589164 is an abundant number, since it is smaller than the sum of its proper divisors (101733536).

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

66589164 is a wasteful number, since it uses less digits than its factorization.

66589164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849709 (or 1849704 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 66589164 is about 8160.2183794308. The cubic root of 66589164 is about 405.3229431513.

The spelling of 66589164 in words is "sixty-six million, five hundred eighty-nine thousand, one hundred sixty-four".