13664422 has 4 divisors (see below), whose sum is σ = 20496636. Its totient is φ = 6832210.

The previous prime is 13664419. The next prime is 13664429. The reversal of 13664422 is 22446631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22446631 = 541 ⋅41491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3416104 + ... + 3416107.

It is an arithmetic number, because the mean of its divisors is an integer number (5124159).

Almost surely, 2^13664422 is an apocalyptic number.

13664422 is a deficient number, since it is larger than the sum of its proper divisors (6832214).

13664422 is an equidigital number, since it uses as much as digits as its factorization.

13664422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832213.

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

The square root of 13664422 is about 3696.5418975037. The cubic root of 13664422 is about 239.0729398121.

The spelling of 13664422 in words is "thirteen million, six hundred sixty-four thousand, four hundred twenty-two".