12660686 has 4 divisors (see below), whose sum is σ = 18991032. Its totient is φ = 6330342.

The previous prime is 12660671. The next prime is 12660721. The reversal of 12660686 is 68606621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68606621 = 37 ⋅1854233.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3165170 + ... + 3165173.

It is an arithmetic number, because the mean of its divisors is an integer number (4747758).

Almost surely, 2^12660686 is an apocalyptic number.

12660686 is a deficient number, since it is larger than the sum of its proper divisors (6330346).

12660686 is an equidigital number, since it uses as much as digits as its factorization.

12660686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6330345.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 12660686 is about 3558.1857736774. The cubic root of 12660686 is about 233.0696617951.

The spelling of 12660686 in words is "twelve million, six hundred sixty thousand, six hundred eighty-six".