12665622 has 16 divisors (see below), whose sum is σ = 25809840. Its totient is φ = 4142112.

The previous prime is 12665593. The next prime is 12665641. The reversal of 12665622 is 22656621.

It is a self number, because there is not a number n which added to its sum of digits gives 12665622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19597 + ... + 20232.

It is an arithmetic number, because the mean of its divisors is an integer number (1613115).

Almost surely, 2^12665622 is an apocalyptic number.

12665622 is an abundant number, since it is smaller than the sum of its proper divisors (13144218).

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

12665622 is a wasteful number, since it uses less digits than its factorization.

12665622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39887.

The product of its digits is 8640, while the sum is 30.

The square root of 12665622 is about 3558.8793179876. The cubic root of 12665622 is about 233.0999466832.

Subtracting 12665622 from its reverse (22656621), we obtain a palindrome (9990999).

The spelling of 12665622 in words is "twelve million, six hundred sixty-five thousand, six hundred twenty-two".