12586664 has 32 divisors (see below), whose sum is σ = 26308800. Its totient is φ = 5610240.

The previous prime is 12586661. The next prime is 12586711. The reversal of 12586664 is 46668521.

It is a super-2 number, since 2×12586664² = 316848221297792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (12586661) 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, 149 + ... + 5019.

It is an arithmetic number, because the mean of its divisors is an integer number (822150).

Almost surely, 2^12586664 is an apocalyptic number.

It is an amenable number.

12586664 is an abundant number, since it is smaller than the sum of its proper divisors (13722136).

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

12586664 is a wasteful number, since it uses less digits than its factorization.

12586664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913 (or 4909 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 12586664 is about 3547.7688763503. The cubic root of 12586664 is about 232.6145517914.

The spelling of 12586664 in words is "twelve million, five hundred eighty-six thousand, six hundred sixty-four".