13664216 has 16 divisors (see below), whose sum is σ = 26166240. Its totient is φ = 6686560.

The previous prime is 13664159. The next prime is 13664219. The reversal of 13664216 is 61246631.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664219) 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, 17795 + ... + 18546.

It is an arithmetic number, because the mean of its divisors is an integer number (1635390).

Almost surely, 2^13664216 is an apocalyptic number.

It is an amenable number.

13664216 is a deficient number, since it is larger than the sum of its proper divisors (12502024).

13664216 is a wasteful number, since it uses less digits than its factorization.

13664216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36394 (or 36390 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 13664216 is about 3696.5140335186. The cubic root of 13664216 is about 239.0717384130.

The spelling of 13664216 in words is "thirteen million, six hundred sixty-four thousand, two hundred sixteen".