163388664 has 40 divisors (see below), whose sum is σ = 457641360. Its totient is φ = 54462672.

The previous prime is 163388663. The next prime is 163388671. The reversal of 163388664 is 466883361.

163388664 is a `hidden beast` number, since 1 + 633 + 8 + 8 + 6 + 6 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163388663) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125424 + ... + 126719.

It is an arithmetic number, because the mean of its divisors is an integer number (11441034).

Almost surely, 2^163388664 is an apocalyptic number.

It is an amenable number.

163388664 is an abundant number, since it is smaller than the sum of its proper divisors (294252696).

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

163388664 is a wasteful number, since it uses less digits than its factorization.

163388664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252161 (or 252148 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 163388664 is about 12782.3575290320. The cubic root of 163388664 is about 546.6893840120.

The spelling of 163388664 in words is "one hundred sixty-three million, three hundred eighty-eight thousand, six hundred sixty-four".