166485733878 has 32 divisors (see below), whose sum is σ = 333700796160. Its totient is φ = 55373824800.

The previous prime is 166485733877. The next prime is 166485733891. The reversal of 166485733878 is 878337584661.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166485733877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5211751 + ... + 5243597.

It is an arithmetic number, because the mean of its divisors is an integer number (10428149880).

Almost surely, 2^166485733878 is an apocalyptic number.

166485733878 is an abundant number, since it is smaller than the sum of its proper divisors (167215062282).

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

166485733878 is a wasteful number, since it uses less digits than its factorization.

166485733878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33732.

The product of its digits is 162570240, while the sum is 66.

The spelling of 166485733878 in words is "one hundred sixty-six billion, four hundred eighty-five million, seven hundred thirty-three thousand, eight hundred seventy-eight".