12165680 has 40 divisors (see below), whose sum is σ = 28447584. Its totient is φ = 4838400.

The previous prime is 12165679. The next prime is 12165691. The reversal of 12165680 is 8656121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18965 + ... + 19595.

Almost surely, 2^12165680 is an apocalyptic number.

12165680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12165680 is an abundant number, since it is smaller than the sum of its proper divisors (16281904).

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

12165680 is a wasteful number, since it uses less digits than its factorization.

12165680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12165680 is about 3487.9334856043. The cubic root of 12165680 is about 229.9916821188.

The spelling of 12165680 in words is "twelve million, one hundred sixty-five thousand, six hundred eighty".