166776668838 has 48 divisors (see below), whose sum is σ = 392715763440. Its totient is φ = 50845102272.

The previous prime is 166776668827. The next prime is 166776668867. The reversal of 166776668838 is 838866677661.

166776668838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3243856 + ... + 3294867.

It is an arithmetic number, because the mean of its divisors is an integer number (8181578405).

Almost surely, 2^166776668838 is an apocalyptic number.

166776668838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166776668838 is an abundant number, since it is smaller than the sum of its proper divisors (225939094602).

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

166776668838 is a wasteful number, since it uses less digits than its factorization.

166776668838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6538853 (or 6538850 counting only the distinct ones).

The product of its digits is 585252864, while the sum is 72.

The spelling of 166776668838 in words is "one hundred sixty-six billion, seven hundred seventy-six million, six hundred sixty-eight thousand, eight hundred thirty-eight".