12567664 has 20 divisors (see below), whose sum is σ = 25632040. Its totient is φ = 5952960.

The previous prime is 12567661. The next prime is 12567671. The reversal of 12567664 is 46676521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12567661) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 20367 + ... + 20974.

It is an arithmetic number, because the mean of its divisors is an integer number (1281602).

Almost surely, 2^12567664 is an apocalyptic number.

It is an amenable number.

12567664 is an abundant number, since it is smaller than the sum of its proper divisors (13064376).

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

12567664 is a wasteful number, since it uses less digits than its factorization.

12567664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41368 (or 41362 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 12567664 is about 3545.0901257937. The cubic root of 12567664 is about 232.4974463049.

It can be divided in two parts, 12567 and 664, that added together give a palindrome (13231).

The spelling of 12567664 in words is "twelve million, five hundred sixty-seven thousand, six hundred sixty-four".