165971110994 has 8 divisors (see below), whose sum is σ = 268107179340. Its totient is φ = 76602051216.

The previous prime is 165971110967. The next prime is 165971111029. The reversal of 165971110994 is 499011179561.

It can be written as a sum of positive squares in 2 ways, for example, as 165964167769 + 6943225 = 407387^2 + 2635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191752109 + ... + 3191752160.

Almost surely, 2^165971110994 is an apocalyptic number.

165971110994 is a deficient number, since it is larger than the sum of its proper divisors (102136068346).

165971110994 is a wasteful number, since it uses less digits than its factorization.

165971110994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383504284.

The product of its (nonzero) digits is 612360, while the sum is 53.

The spelling of 165971110994 in words is "one hundred sixty-five billion, nine hundred seventy-one million, one hundred ten thousand, nine hundred ninety-four".