13664541 has 8 divisors (see below), whose sum is σ = 19875744. Its totient is φ = 8281520.

The previous prime is 13664533. The next prime is 13664543. The reversal of 13664541 is 14546631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13664541 - 2³ = 13664533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13664499 and 13664508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207006 + ... + 207071.

It is an arithmetic number, because the mean of its divisors is an integer number (2484468).

Almost surely, 2^13664541 is an apocalyptic number.

13664541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13664541 is a deficient number, since it is larger than the sum of its proper divisors (6211203).

13664541 is a wasteful number, since it uses less digits than its factorization.

13664541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414091.

The product of its digits is 8640, while the sum is 30.

The square root of 13664541 is about 3696.5579935935. The cubic root of 13664541 is about 239.0736338187.

The spelling of 13664541 in words is "thirteen million, six hundred sixty-four thousand, five hundred forty-one".