165878163 has 24 divisors (see below), whose sum is σ = 276762096. Its totient is φ = 94617600.

The previous prime is 165878159. The next prime is 165878177. The reversal of 165878163 is 361878561.

165878163 is a `hidden beast` number, since 1 + 6 + 587 + 8 + 1 + 63 = 666.

165878163 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 165878163 - 2² = 165878159 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (165878123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47598 + ... + 50963.

It is an arithmetic number, because the mean of its divisors is an integer number (11531754).

Almost surely, 2^165878163 is an apocalyptic number.

165878163 is a deficient number, since it is larger than the sum of its proper divisors (110883933).

165878163 is a wasteful number, since it uses less digits than its factorization.

165878163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98595 (or 98592 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 165878163 is about 12879.3696662531. The cubic root of 165878163 is about 549.4519753371.

The spelling of 165878163 in words is "one hundred sixty-five million, eight hundred seventy-eight thousand, one hundred sixty-three".