165707066823 has 32 divisors (see below), whose sum is σ = 242191503360. Its totient is φ = 100310945280.

The previous prime is 165707066809. The next prime is 165707066851. The reversal of 165707066823 is 328660707561.

It is not a de Polignac number, because 165707066823 - 2²¹ = 165704969671 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165707066023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1920418 + ... + 2004848.

It is an arithmetic number, because the mean of its divisors is an integer number (7568484480).

Almost surely, 2^165707066823 is an apocalyptic number.

165707066823 is a deficient number, since it is larger than the sum of its proper divisors (76484436537).

165707066823 is a wasteful number, since it uses less digits than its factorization.

165707066823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85807.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 165707066823 in words is "one hundred sixty-five billion, seven hundred seven million, sixty-six thousand, eight hundred twenty-three".