12664663 has 4 divisors (see below), whose sum is σ = 13816008. Its totient is φ = 11513320.

The previous prime is 12664607. The next prime is 12664669. The reversal of 12664663 is 36646621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12664663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575656 + ... + 575677.

It is an arithmetic number, because the mean of its divisors is an integer number (3454002).

Almost surely, 2^12664663 is an apocalyptic number.

12664663 is a deficient number, since it is larger than the sum of its proper divisors (1151345).

12664663 is a wasteful number, since it uses less digits than its factorization.

12664663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151344.

The product of its digits is 31104, while the sum is 34.

The square root of 12664663 is about 3558.7445820120. The cubic root of 12664663 is about 233.0940633430.

It can be divided in two parts, 1266 and 4663, that added together give a square (5929 = 77²).

The spelling of 12664663 in words is "twelve million, six hundred sixty-four thousand, six hundred sixty-three".