166478438706 has 16 divisors (see below), whose sum is σ = 334027482048. Its totient is φ = 55314378800.

The previous prime is 166478438681. The next prime is 166478438719. The reversal of 166478438706 is 607834874661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166478438706.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44606505 + ... + 44610236.

It is an arithmetic number, because the mean of its divisors is an integer number (20876717628).

Almost surely, 2^166478438706 is an apocalyptic number.

166478438706 is an abundant number, since it is smaller than the sum of its proper divisors (167549043342).

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

166478438706 is a wasteful number, since it uses less digits than its factorization.

166478438706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89217057.

The product of its (nonzero) digits is 32514048, while the sum is 60.

The spelling of 166478438706 in words is "one hundred sixty-six billion, four hundred seventy-eight million, four hundred thirty-eight thousand, seven hundred six".