216176664 has 48 divisors (see below), whose sum is σ = 594047160. Its totient is φ = 65507200.

The previous prime is 216176651. The next prime is 216176669. The reversal of 216176664 is 466671612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216176669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34317 + ... + 40124.

Almost surely, 2^216176664 is an apocalyptic number.

216176664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216176664 is an abundant number, since it is smaller than the sum of its proper divisors (377870496).

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

216176664 is a wasteful number, since it uses less digits than its factorization.

216176664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74472 (or 74457 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 216176664 is about 14702.9474596082. The cubic root of 216176664 is about 600.1635332019.

The spelling of 216176664 in words is "two hundred sixteen million, one hundred seventy-six thousand, six hundred sixty-four".