163105665 has 16 divisors (see below), whose sum is σ = 267039168. Its totient is φ = 84966336.

The previous prime is 163105639. The next prime is 163105703. The reversal of 163105665 is 566501361.

It is not a de Polignac number, because 163105665 - 2⁸ = 163105409 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 125794 + ... + 127083.

It is an arithmetic number, because the mean of its divisors is an integer number (16689948).

Almost surely, 2^163105665 is an apocalyptic number.

163105665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163105665 is a deficient number, since it is larger than the sum of its proper divisors (103933503).

163105665 is a wasteful number, since it uses less digits than its factorization.

163105665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252928.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 163105665 is about 12771.2828251511. The cubic root of 163105665 is about 546.3735686323.

The spelling of 163105665 in words is "one hundred sixty-three million, one hundred five thousand, six hundred sixty-five".