164356665 has 32 divisors (see below), whose sum is σ = 287456256. Its totient is φ = 79527360.

The previous prime is 164356651. The next prime is 164356679. The reversal of 164356665 is 566653461.

It is an interprime number because it is at equal distance from previous prime (164356651) and next prime (164356679).

It is not a de Polignac number, because 164356665 - 2⁷ = 164356537 is a prime.

It is a super-2 number, since 2×164356665² = 54026226659844450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145794 + ... + 146916.

It is an arithmetic number, because the mean of its divisors is an integer number (8983008).

Almost surely, 2^164356665 is an apocalyptic number.

164356665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164356665 is a deficient number, since it is larger than the sum of its proper divisors (123099591).

164356665 is a wasteful number, since it uses less digits than its factorization.

164356665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029.

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

The square root of 164356665 is about 12820.1663405745. The cubic root of 164356665 is about 547.7668847493.

The spelling of 164356665 in words is "one hundred sixty-four million, three hundred fifty-six thousand, six hundred sixty-five".