12166656 has 60 divisors (see below), whose sum is σ = 32781012. Its totient is φ = 4009984.

The previous prime is 12166607. The next prime is 12166667. The reversal of 12166656 is 65666121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136660 + ... + 136748.

Almost surely, 2^12166656 is an apocalyptic number.

12166656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12166656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16390506).

12166656 is an abundant number, since it is smaller than the sum of its proper divisors (20614356).

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

12166656 is an frugal number, since it uses more digits than its factorization.

12166656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 94 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 12166656 is about 3488.0733937232. The cubic root of 12166656 is about 229.9978323677.

The spelling of 12166656 in words is "twelve million, one hundred sixty-six thousand, six hundred fifty-six".