165118687 has 4 divisors (see below), whose sum is σ = 165145176. Its totient is φ = 165092200.

The previous prime is 165118673. The next prime is 165118697. The reversal of 165118687 is 786811561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 165118687 - 2⁷ = 165118559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165118697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1812 + ... + 18262.

It is an arithmetic number, because the mean of its divisors is an integer number (41286294).

Almost surely, 2^165118687 is an apocalyptic number.

165118687 is a deficient number, since it is larger than the sum of its proper divisors (26489).

165118687 is a wasteful number, since it uses less digits than its factorization.

165118687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26488.

The product of its digits is 80640, while the sum is 43.

The square root of 165118687 is about 12849.8516333847. The cubic root of 165118687 is about 548.6121338720.

The spelling of 165118687 in words is "one hundred sixty-five million, one hundred eighteen thousand, six hundred eighty-seven".