866549632 has 32 divisors (see below), whose sum is σ = 1859127480. Its totient is φ = 399945216.

The previous prime is 866549569. The next prime is 866549641. The reversal of 866549632 is 236945668.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258718 + ... + 262045.

Almost surely, 2^866549632 is an apocalyptic number.

It is an amenable number.

866549632 is an abundant number, since it is smaller than the sum of its proper divisors (992577848).

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

866549632 is a wasteful number, since it uses less digits than its factorization.

866549632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520790 (or 520778 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The square root of 866549632 is about 29437.2150856700. The cubic root of 866549632 is about 953.3765834726.

The spelling of 866549632 in words is "eight hundred sixty-six million, five hundred forty-nine thousand, six hundred thirty-two".