12866686 has 16 divisors (see below), whose sum is σ = 23218560. Its totient is φ = 5223960.

The previous prime is 12866681. The next prime is 12866717. The reversal of 12866686 is 68666821.

12866686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12866681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23920 + ... + 24451.

It is an arithmetic number, because the mean of its divisors is an integer number (1451160).

Almost surely, 2^12866686 is an apocalyptic number.

12866686 is a deficient number, since it is larger than the sum of its proper divisors (10351874).

12866686 is a wasteful number, since it uses less digits than its factorization.

12866686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48399.

The product of its digits is 165888, while the sum is 43.

The square root of 12866686 is about 3587.0163088562. The cubic root of 12866686 is about 234.3269469722.

The spelling of 12866686 in words is "twelve million, eight hundred sixty-six thousand, six hundred eighty-six".