12664536 has 32 divisors (see below), whose sum is σ = 33039360. Its totient is φ = 4037792.

The previous prime is 12664529. The next prime is 12664537. The reversal of 12664536 is 63546621.

12664536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12664497 and 12664506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664537) 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, 10920 + ... + 12023.

It is an arithmetic number, because the mean of its divisors is an integer number (1032480).

Almost surely, 2^12664536 is an apocalyptic number.

It is an amenable number.

12664536 is an abundant number, since it is smaller than the sum of its proper divisors (20374824).

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

12664536 is a wasteful number, since it uses less digits than its factorization.

12664536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22975 (or 22971 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 12664536 is about 3558.7267385963. The cubic root of 12664536 is about 233.0932841922.

The spelling of 12664536 in words is "twelve million, six hundred sixty-four thousand, five hundred thirty-six".