166660878 has 8 divisors (see below), whose sum is σ = 333321768. Its totient is φ = 55553624.

The previous prime is 166660811. The next prime is 166660909. The reversal of 166660878 is 878066661.

166660878 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

166660878 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13888401 + ... + 13888412.

It is an arithmetic number, because the mean of its divisors is an integer number (41665221).

Almost surely, 2^166660878 is an apocalyptic number.

166660878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166660878 is a wasteful number, since it uses less digits than its factorization.

166660878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27776818.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 166660878 is about 12909.7202913154. The cubic root of 166660878 is about 550.3148368233.

The spelling of 166660878 in words is "one hundred sixty-six million, six hundred sixty thousand, eight hundred seventy-eight".