163665764 has 24 divisors (see below), whose sum is σ = 294141120. Its totient is φ = 79653024.

The previous prime is 163665757. The next prime is 163665779. The reversal of 163665764 is 467566361.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20942 + ... + 27674.

It is an arithmetic number, because the mean of its divisors is an integer number (12255880).

Almost surely, 2^163665764 is an apocalyptic number.

It is an amenable number.

163665764 is a deficient number, since it is larger than the sum of its proper divisors (130475356).

163665764 is a wasteful number, since it uses less digits than its factorization.

163665764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6899 (or 6897 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 163665764 is about 12793.1920957985. The cubic root of 163665764 is about 546.9982631929.

The spelling of 163665764 in words is "one hundred sixty-three million, six hundred sixty-five thousand, seven hundred sixty-four".