12166457808 has 80 divisors (see below), whose sum is σ = 32808939776. Its totient is φ = 3881157120.

The previous prime is 12166457789. The next prime is 12166457837. The reversal of 12166457808 is 80875466121.

12166457808 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 (48).

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 15 ways as a sum of consecutive naturals, for example, 52185 + ... + 164487.

Almost surely, 2^12166457808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12166457808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16404469888).

12166457808 is an abundant number, since it is smaller than the sum of its proper divisors (20642481968).

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

12166457808 is a wasteful number, since it uses less digits than its factorization.

12166457808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112412 (or 112406 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 12166457808 in words is "twelve billion, one hundred sixty-six million, four hundred fifty-seven thousand, eight hundred eight".