13660567 has 4 divisors (see below), whose sum is σ = 13667976. Its totient is φ = 13653160.

The previous prime is 13660561. The next prime is 13660573. The reversal of 13660567 is 76506631.

It is a happy number.

13660567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 76506631 = 787 ⋅97213.

It is an interprime number because it is at equal distance from previous prime (13660561) and next prime (13660573).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13660567 is a prime.

It is a super-2 number, since 2×13660567² = 373222181522978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13660561) 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, 1488 + ... + 5434.

It is an arithmetic number, because the mean of its divisors is an integer number (3416994).

Almost surely, 2^13660567 is an apocalyptic number.

13660567 is a deficient number, since it is larger than the sum of its proper divisors (7409).

13660567 is an equidigital number, since it uses as much as digits as its factorization.

13660567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 13660567 is about 3696.0204274327. The cubic root of 13660567 is about 239.0504553175.

The spelling of 13660567 in words is "thirteen million, six hundred sixty thousand, five hundred sixty-seven".