165986164376907 has 32 divisors (see below), whose sum is σ = 277044423897600. Its totient is φ = 86191598535168.

The previous prime is 165986164376803. The next prime is 165986164376909. The reversal of 165986164376907 is 709673461689561.

It is not a de Polignac number, because 165986164376907 - 2¹² = 165986164372811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165986164376909) 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, 8016321357 + ... + 8016342062.

It is an arithmetic number, because the mean of its divisors is an integer number (8657638246800).

Almost surely, 2^{165986164376907} is an apocalyptic number.

165986164376907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

165986164376907 is a deficient number, since it is larger than the sum of its proper divisors (111058259520693).

165986164376907 is a wasteful number, since it uses less digits than its factorization.

165986164376907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16032663475.

The product of its (nonzero) digits is 2469035520, while the sum is 78.

The spelling of 165986164376907 in words is "one hundred sixty-five trillion, nine hundred eighty-six billion, one hundred sixty-four million, three hundred seventy-six thousand, nine hundred seven".