165664527 has 32 divisors (see below), whose sum is σ = 261648384. Its totient is φ = 91238400.

The previous prime is 165664493. The next prime is 165664531. The reversal of 165664527 is 725466561.

It is not a de Polignac number, because 165664527 - 2⁶ = 165664463 is a prime.

It is a super-2 number, since 2×165664527² = 54889471012267458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165664537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258127 + ... + 258767.

It is an arithmetic number, because the mean of its divisors is an integer number (8176512).

Almost surely, 2^165664527 is an apocalyptic number.

165664527 is a deficient number, since it is larger than the sum of its proper divisors (95983857).

165664527 is a wasteful number, since it uses less digits than its factorization.

165664527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its digits is 302400, while the sum is 42.

The square root of 165664527 is about 12871.0732652720. The cubic root of 165664527 is about 549.2159925954.

The spelling of 165664527 in words is "one hundred sixty-five million, six hundred sixty-four thousand, five hundred twenty-seven".