13664072 has 8 divisors (see below), whose sum is σ = 25620150. Its totient is φ = 6832032.

The previous prime is 13664071. The next prime is 13664129. The reversal of 13664072 is 27046631.

13664072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10329796 + 3334276 = 3214^2 + 1826^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13664071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 853997 + ... + 854012.

Almost surely, 2^13664072 is an apocalyptic number.

It is an amenable number.

13664072 is a deficient number, since it is larger than the sum of its proper divisors (11956078).

13664072 is a wasteful number, since it uses less digits than its factorization.

13664072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708015 (or 1708011 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 13664072 is about 3696.4945556568. The cubic root of 13664072 is about 239.0708985928.

The spelling of 13664072 in words is "thirteen million, six hundred sixty-four thousand, seventy-two".