12665886 has 8 divisors (see below), whose sum is σ = 25331784. Its totient is φ = 4221960.

The previous prime is 12665869. The next prime is 12665927. The reversal of 12665886 is 68856621.

It is a sphenic number, since it is the product of 3 distinct primes.

12665886 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055485 + ... + 1055496.

It is an arithmetic number, because the mean of its divisors is an integer number (3166473).

Almost surely, 2^12665886 is an apocalyptic number.

12665886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12665886 is a wasteful number, since it uses less digits than its factorization.

12665886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110986.

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

The square root of 12665886 is about 3558.9164081220. The cubic root of 12665886 is about 233.1015662367.

The spelling of 12665886 in words is "twelve million, six hundred sixty-five thousand, eight hundred eighty-six".