13867665 has 48 divisors (see below), whose sum is σ = 26996352. Its totient is φ = 5953536.

The previous prime is 13867661. The next prime is 13867669. The reversal of 13867665 is 56676831.

13867665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13867661) and next prime (13867669).

It is not a de Polignac number, because 13867665 - 2² = 13867661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13867661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30117 + ... + 30573.

It is an arithmetic number, because the mean of its divisors is an integer number (562424).

Almost surely, 2^13867665 is an apocalyptic number.

13867665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13867665 is a deficient number, since it is larger than the sum of its proper divisors (13128687).

13867665 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (13867664) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (489).

13867665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 489 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 13867665 is about 3723.9313903454. The cubic root of 13867665 is about 240.2524253851.

The spelling of 13867665 in words is "thirteen million, eight hundred sixty-seven thousand, six hundred sixty-five".