166349081856 has 36 divisors (see below), whose sum is σ = 442731152192. Its totient is φ = 55449693696.

The previous prime is 166349081831. The next prime is 166349081879. The reversal of 166349081856 is 658180943661.

166349081856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 166349081796 and 166349081805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108299416 + ... + 108300951.

Almost surely, 2^166349081856 is an apocalyptic number.

166349081856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166349081856 is an abundant number, since it is smaller than the sum of its proper divisors (276382070336).

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

166349081856 is an equidigital number, since it uses as much as digits as its factorization.

166349081856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216600386 (or 216600372 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 166349081856 in words is "one hundred sixty-six billion, three hundred forty-nine million, eighty-one thousand, eight hundred fifty-six".