165877677845 has 16 divisors (see below), whose sum is σ = 222198939072. Its totient is φ = 117832767360.

The previous prime is 165877677821. The next prime is 165877677853. The reversal of 165877677845 is 548776778561.

It is not a de Polignac number, because 165877677845 - 2¹⁸ = 165877415701 is a prime.

It is a congruent number.

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, 35066912 + ... + 35071641.

It is an arithmetic number, because the mean of its divisors is an integer number (13887433692).

Almost surely, 2^165877677845 is an apocalyptic number.

It is an amenable number.

165877677845 is a deficient number, since it is larger than the sum of its proper divisors (56321261227).

165877677845 is a wasteful number, since it uses less digits than its factorization.

165877677845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70138612.

The product of its digits is 553190400, while the sum is 71.

The spelling of 165877677845 in words is "one hundred sixty-five billion, eight hundred seventy-seven million, six hundred seventy-seven thousand, eight hundred forty-five".