166804878 has 16 divisors (see below), whose sum is σ = 348114816. Its totient is φ = 53184120.

The previous prime is 166804877. The next prime is 166804879. The reversal of 166804878 is 878408661.

It is an interprime number because it is at equal distance from previous prime (166804877) and next prime (166804879).

166804878 is a modest number, since divided by 4878 gives 1668 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166804871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604228 + ... + 604503.

It is an arithmetic number, because the mean of its divisors is an integer number (21757176).

Almost surely, 2^166804878 is an apocalyptic number.

166804878 is an abundant number, since it is smaller than the sum of its proper divisors (181309938).

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

166804878 is a wasteful number, since it uses less digits than its factorization.

166804878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208759.

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 166804878 is about 12915.2962799930. The cubic root of 166804878 is about 550.4732873746.

The spelling of 166804878 in words is "one hundred sixty-six million, eight hundred four thousand, eight hundred seventy-eight".