163465665 has 64 divisors (see below), whose sum is σ = 294624000. Its totient is φ = 76723200.

The previous prime is 163465657. The next prime is 163465681. The reversal of 163465665 is 566564361.

163465665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163465665 - 2³ = 163465657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1097011 + ... + 1097159.

It is an arithmetic number, because the mean of its divisors is an integer number (4603500).

Almost surely, 2^163465665 is an apocalyptic number.

163465665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163465665 is a deficient number, since it is larger than the sum of its proper divisors (131158335).

163465665 is a wasteful number, since it uses less digits than its factorization.

163465665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338.

The product of its digits is 388800, while the sum is 42.

The square root of 163465665 is about 12785.3691773058. The cubic root of 163465665 is about 546.7752508791.

The spelling of 163465665 in words is "one hundred sixty-three million, four hundred sixty-five thousand, six hundred sixty-five".