13440664 has 16 divisors (see below), whose sum is σ = 25401600. Its totient is φ = 6666912.

The previous prime is 13440653. The next prime is 13440677. The reversal of 13440664 is 46604431.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5599 + ... + 7630.

It is an arithmetic number, because the mean of its divisors is an integer number (1587600).

Almost surely, 2^13440664 is an apocalyptic number.

It is an amenable number.

13440664 is a deficient number, since it is larger than the sum of its proper divisors (11960936).

13440664 is a wasteful number, since it uses less digits than its factorization.

13440664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13362 (or 13358 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 13440664 is about 3666.1511152706. The cubic root of 13440664 is about 237.7607934867.

The spelling of 13440664 in words is "thirteen million, four hundred forty thousand, six hundred sixty-four".