12886566 has 32 divisors (see below), whose sum is σ = 32133888. Its totient is φ = 3347040.

The previous prime is 12886553. The next prime is 12886567. The reversal of 12886566 is 66568821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12886567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13485 + ... + 14408.

It is an arithmetic number, because the mean of its divisors is an integer number (1004184).

Almost surely, 2^12886566 is an apocalyptic number.

12886566 is an abundant number, since it is smaller than the sum of its proper divisors (19247322).

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

12886566 is a wasteful number, since it uses less digits than its factorization.

12886566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27916.

The product of its digits is 138240, while the sum is 42.

The square root of 12886566 is about 3589.7863446172. The cubic root of 12886566 is about 234.4475691371.

The spelling of 12886566 in words is "twelve million, eight hundred eighty-six thousand, five hundred sixty-six".