12666590 has 16 divisors (see below), whose sum is σ = 22921488. Its totient is φ = 5039616.

The previous prime is 12666587. The next prime is 12666593. The reversal of 12666590 is 9566621.

It is a happy number.

12666590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12666587) and next prime (12666593).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12666590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666593) 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, 1352 + ... + 5211.

It is an arithmetic number, because the mean of its divisors is an integer number (1432593).

Almost surely, 2^12666590 is an apocalyptic number.

12666590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12666590 is a deficient number, since it is larger than the sum of its proper divisors (10254898).

12666590 is a wasteful number, since it uses less digits than its factorization.

12666590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 12666590 is about 3559.0153132573. The cubic root of 12666590 is about 233.1058849361.

The spelling of 12666590 in words is "twelve million, six hundred sixty-six thousand, five hundred ninety".