12166668 has 36 divisors (see below), whose sum is σ = 31508568. Its totient is φ = 3956160.

The previous prime is 12166667. The next prime is 12166681. The reversal of 12166668 is 86666121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12166667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2646 + ... + 5597.

It is an arithmetic number, because the mean of its divisors is an integer number (875238).

Almost surely, 2^12166668 is an apocalyptic number.

12166668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12166668 is an abundant number, since it is smaller than the sum of its proper divisors (19341900).

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

12166668 is a wasteful number, since it uses less digits than its factorization.

12166668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8294 (or 8289 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 12166668 is about 3488.0751138701. The cubic root of 12166668 is about 229.9979079835.

The spelling of 12166668 in words is "twelve million, one hundred sixty-six thousand, six hundred sixty-eight".