166113440556 has 48 divisors (see below), whose sum is σ = 443010839040. Its totient is φ = 47456519040.

The previous prime is 166113440551. The next prime is 166113440611. The reversal of 166113440556 is 655044311661.

166113440556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (166113440551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863625 + ... + 1038303.

It is an arithmetic number, because the mean of its divisors is an integer number (9229392480).

Almost surely, 2^166113440556 is an apocalyptic number.

It is an amenable number.

166113440556 is an abundant number, since it is smaller than the sum of its proper divisors (276897398484).

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

166113440556 is a wasteful number, since it uses less digits than its factorization.

166113440556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186014 (or 186012 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 166113440556 in words is "one hundred sixty-six billion, one hundred thirteen million, four hundred forty thousand, five hundred fifty-six".