164665717 has 12 divisors (see below), whose sum is σ = 176159520. Its totient is φ = 153628640.

The previous prime is 164665703. The next prime is 164665733. The reversal of 164665717 is 717566461.

164665717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-164665717 is a prime.

It is a super-2 number, since 2×164665717² = 54229596710248178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164665777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36534 + ... + 40792.

It is an arithmetic number, because the mean of its divisors is an integer number (14679960).

Almost surely, 2^164665717 is an apocalyptic number.

It is an amenable number.

164665717 is a deficient number, since it is larger than the sum of its proper divisors (11493803).

164665717 is an equidigital number, since it uses as much as digits as its factorization.

164665717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4364 (or 4323 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 164665717 is about 12832.2140334394. The cubic root of 164665717 is about 548.1100053106.

The spelling of 164665717 in words is "one hundred sixty-four million, six hundred sixty-five thousand, seven hundred seventeen".