165664604105 has 64 divisors (see below), whose sum is σ = 269560521216. Its totient is φ = 94383360000.

The previous prime is 165664604089. The next prime is 165664604111. The reversal of 165664604105 is 501406466561.

165664604105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165664604105 - 2⁴ = 165664604089 is a prime.

It is a super-2 number, since 2×165664604105² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 341645 + ... + 669365.

It is an arithmetic number, because the mean of its divisors is an integer number (4211883144).

Almost surely, 2^165664604105 is an apocalyptic number.

It is an amenable number.

165664604105 is a deficient number, since it is larger than the sum of its proper divisors (103895917111).

165664604105 is a wasteful number, since it uses less digits than its factorization.

165664604105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327858.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 165664604105 in words is "one hundred sixty-five billion, six hundred sixty-four million, six hundred four thousand, one hundred five".