13664445 has 16 divisors (see below), whose sum is σ = 21910272. Its totient is φ = 7272000.

The previous prime is 13664429. The next prime is 13664467. The reversal of 13664445 is 54446631.

It is not a de Polignac number, because 13664445 - 2⁴ = 13664429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10659 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (1369392).

Almost surely, 2^13664445 is an apocalyptic number.

13664445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13664445 is a deficient number, since it is larger than the sum of its proper divisors (8245827).

13664445 is a wasteful number, since it uses less digits than its factorization.

13664445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972.

The product of its digits is 34560, while the sum is 33.

The square root of 13664445 is about 3696.5450085181. The cubic root of 13664445 is about 239.0730739481.

The spelling of 13664445 in words is "thirteen million, six hundred sixty-four thousand, four hundred forty-five".