13667686 has 4 divisors (see below), whose sum is σ = 20501532. Its totient is φ = 6833842.

The previous prime is 13667659. The next prime is 13667699. The reversal of 13667686 is 68676631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68676631 = 1289 ⋅53279.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3416920 + ... + 3416923.

It is an arithmetic number, because the mean of its divisors is an integer number (5125383).

Almost surely, 2^13667686 is an apocalyptic number.

13667686 is a deficient number, since it is larger than the sum of its proper divisors (6833846).

13667686 is an equidigital number, since it uses as much as digits as its factorization.

13667686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833845.

The product of its digits is 217728, while the sum is 43.

The square root of 13667686 is about 3696.9833648530. The cubic root of 13667686 is about 239.0919739615.

The spelling of 13667686 in words is "thirteen million, six hundred sixty-seven thousand, six hundred eighty-six".