216832664 has 16 divisors (see below), whose sum is σ = 408913920. Its totient is φ = 107788960.

The previous prime is 216832639. The next prime is 216832669. The reversal of 216832664 is 466238612.

216832664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216832669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76952 + ... + 79719.

It is an arithmetic number, because the mean of its divisors is an integer number (25557120).

Almost surely, 2^216832664 is an apocalyptic number.

It is an amenable number.

216832664 is a deficient number, since it is larger than the sum of its proper divisors (192081256).

216832664 is a wasteful number, since it uses less digits than its factorization.

216832664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156850 (or 156846 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 216832664 is about 14725.2390133403. The cubic root of 216832664 is about 600.7699966045.

The spelling of 216832664 in words is "two hundred sixteen million, eight hundred thirty-two thousand, six hundred sixty-four".