165907272906 has 48 divisors (see below), whose sum is σ = 361581970464. Its totient is φ = 54977308512.

The previous prime is 165907272877. The next prime is 165907272907. The reversal of 165907272906 is 609272709561.

165907272906 is a `hidden beast` number, since 1 + 6 + 590 + 7 + 27 + 29 + 0 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165907272907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4531285 + ... + 4567751.

It is an arithmetic number, because the mean of its divisors is an integer number (7532957718).

Almost surely, 2^165907272906 is an apocalyptic number.

165907272906 is an abundant number, since it is smaller than the sum of its proper divisors (195674697558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165907272906 is a wasteful number, since it uses less digits than its factorization.

165907272906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37955 (or 37952 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 165907272906 in words is "one hundred sixty-five billion, nine hundred seven million, two hundred seventy-two thousand, nine hundred six".