13401664 has 14 divisors (see below), whose sum is σ = 26594054. Its totient is φ = 6700800.

The previous prime is 13401637. The next prime is 13401667. The reversal of 13401664 is 46610431.

It can be written as a sum of positive squares in only one way, i.e., 8526400 + 4875264 = 2920^2 + 2208^2 .

It is not an unprimeable number, because it can be changed into a prime (13401667) by changing a digit.

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 as a sum of consecutive naturals, namely, 104637 + ... + 104764.

Almost surely, 2^13401664 is an apocalyptic number.

It is an amenable number.

13401664 is a deficient number, since it is larger than the sum of its proper divisors (13192390).

13401664 is an equidigital number, since it uses as much as digits as its factorization.

13401664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209413 (or 209403 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 13401664 is about 3660.8283215688. The cubic root of 13401664 is about 237.5306051049.

The spelling of 13401664 in words is "thirteen million, four hundred one thousand, six hundred sixty-four".