163664407 has 16 divisors (see below), whose sum is σ = 175887360. Its totient is φ = 152006400.

The previous prime is 163664399. The next prime is 163664419. The reversal of 163664407 is 704466361.

It is a cyclic number.

It is not a de Polignac number, because 163664407 - 2³ = 163664399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163604407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77607 + ... + 79687.

It is an arithmetic number, because the mean of its divisors is an integer number (10992960).

Almost surely, 2^163664407 is an apocalyptic number.

163664407 is a deficient number, since it is larger than the sum of its proper divisors (12222953).

163664407 is a wasteful number, since it uses less digits than its factorization.

163664407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 163664407 is about 12793.1390596679. The cubic root of 163664407 is about 546.9967514153.

The spelling of 163664407 in words is "one hundred sixty-three million, six hundred sixty-four thousand, four hundred seven".