164996665 has 16 divisors (see below), whose sum is σ = 209520000. Its totient is φ = 124388352.

The previous prime is 164996659. The next prime is 164996681. The reversal of 164996665 is 566699461.

It is a cyclic number.

It is not a de Polignac number, because 164996665 - 2¹⁷ = 164865593 is a prime.

It is a super-2 number, since 2×164996665² = 54447798922244450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13836 + ... + 22834.

It is an arithmetic number, because the mean of its divisors is an integer number (13095000).

Almost surely, 2^164996665 is an apocalyptic number.

It is an amenable number.

164996665 is a deficient number, since it is larger than the sum of its proper divisors (44523335).

164996665 is a wasteful number, since it uses less digits than its factorization.

164996665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9216.

The product of its digits is 2099520, while the sum is 52.

The square root of 164996665 is about 12845.1027633102. The cubic root of 164996665 is about 548.4769598992.

The spelling of 164996665 in words is "one hundred sixty-four million, nine hundred ninety-six thousand, six hundred sixty-five".