13664567 has 8 divisors (see below), whose sum is σ = 15760800. Its totient is φ = 11604384.

The previous prime is 13664543. The next prime is 13664569. The reversal of 13664567 is 76546631.

It is a happy number.

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 13664567 - 2¹⁸ = 13402423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13664567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664569) 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, 8192 + ... + 9717.

It is an arithmetic number, because the mean of its divisors is an integer number (1970100).

Almost surely, 2^13664567 is an apocalyptic number.

13664567 is a deficient number, since it is larger than the sum of its proper divisors (2096233).

13664567 is a wasteful number, since it uses less digits than its factorization.

13664567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18025.

The product of its digits is 90720, while the sum is 38.

The square root of 13664567 is about 3696.5615103769. The cubic root of 13664567 is about 239.0737854498.

The spelling of 13664567 in words is "thirteen million, six hundred sixty-four thousand, five hundred sixty-seven".