166626278766 has 32 divisors (see below), whose sum is σ = 370304407200. Its totient is φ = 55538524800.

The previous prime is 166626278759. The next prime is 166626278783. The reversal of 166626278766 is 667872626661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 828966 + ... + 1010166.

It is an arithmetic number, because the mean of its divisors is an integer number (11572012725).

Almost surely, 2^166626278766 is an apocalyptic number.

166626278766 is an abundant number, since it is smaller than the sum of its proper divisors (203678128434).

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

166626278766 is a wasteful number, since it uses less digits than its factorization.

166626278766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198241 (or 198235 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 166626278766 in words is "one hundred sixty-six billion, six hundred twenty-six million, two hundred seventy-eight thousand, seven hundred sixty-six".