13668615 has 32 divisors (see below), whose sum is σ = 24560640. Its totient is φ = 7211808.

The previous prime is 13668583. The next prime is 13668631. The reversal of 13668615 is 51686631.

It is a happy number.

13668615 is a `hidden beast` number, since 1 + 36 + 6 + 8 + 615 = 666.

13668615 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13668615 - 2⁵ = 13668583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13668615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13414 + ... + 14396.

It is an arithmetic number, because the mean of its divisors is an integer number (767520).

Almost surely, 2^13668615 is an apocalyptic number.

13668615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13668615 is a deficient number, since it is larger than the sum of its proper divisors (10892025).

13668615 is a wasteful number, since it uses less digits than its factorization.

13668615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1094 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 13668615 is about 3697.1090056962. The cubic root of 13668615 is about 239.0973909090.

The spelling of 13668615 in words is "thirteen million, six hundred sixty-eight thousand, six hundred fifteen".