13715666 has 8 divisors (see below), whose sum is σ = 21283020. Its totient is φ = 6621328.

The previous prime is 13715657. The next prime is 13715683. The reversal of 13715666 is 66651731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13535041 + 180625 = 3679^2 + 425^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118181 + ... + 118296.

Almost surely, 2^13715666 is an apocalyptic number.

13715666 is a deficient number, since it is larger than the sum of its proper divisors (7567354).

13715666 is a wasteful number, since it uses less digits than its factorization.

13715666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236508.

The product of its digits is 22680, while the sum is 35.

The square root of 13715666 is about 3703.4667542723. The cubic root of 13715666 is about 239.3714222754.

The spelling of 13715666 in words is "thirteen million, seven hundred fifteen thousand, six hundred sixty-six".