12580866 has 32 divisors (see below), whose sum is σ = 28558080. Its totient is φ = 4103568.

The previous prime is 12580859. The next prime is 12580871. The reversal of 12580866 is 66808521.

It is a happy number.

12580866 is a `hidden beast` number, since 12 + 580 + 8 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 12580866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60 + ... + 5016.

It is an arithmetic number, because the mean of its divisors is an integer number (892440).

Almost surely, 2^12580866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12580866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14279040).

12580866 is an abundant number, since it is smaller than the sum of its proper divisors (15977214).

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

12580866 is a wasteful number, since it uses less digits than its factorization.

12580866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015 (or 5009 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 12580866 is about 3546.9516489515. The cubic root of 12580866 is about 232.5788286293.

The spelling of 12580866 in words is "twelve million, five hundred eighty thousand, eight hundred sixty-six".