166578484806 has 36 divisors (see below), whose sum is σ = 380915635932. Its totient is φ = 52603729992.

The previous prime is 166578484777. The next prime is 166578484843. The reversal of 166578484806 is 608484875661.

166578484806 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 78 + 484 + 80 + 6 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12811176 + ... + 12824171.

It is an arithmetic number, because the mean of its divisors is an integer number (10580989887).

Almost surely, 2^166578484806 is an apocalyptic number.

166578484806 is an abundant number, since it is smaller than the sum of its proper divisors (214337151126).

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

166578484806 is a wasteful number, since it uses less digits than its factorization.

166578484806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25635393 (or 25635371 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 63.

The spelling of 166578484806 in words is "one hundred sixty-six billion, five hundred seventy-eight million, four hundred eighty-four thousand, eight hundred six".