13716661 has 4 divisors (see below), whose sum is σ = 15676192. Its totient is φ = 11757132.

The previous prime is 13716649. The next prime is 13716667. The reversal of 13716661 is 16661731.

13716661 is nontrivially palindromic in base 6.

13716661 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16661731 = 487 ⋅34213.

It is a cyclic number.

It is not a de Polignac number, because 13716661 - 2⁹ = 13716149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13716667) 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, 979755 + ... + 979768.

It is an arithmetic number, because the mean of its divisors is an integer number (3919048).

Almost surely, 2^13716661 is an apocalyptic number.

It is an amenable number.

13716661 is a deficient number, since it is larger than the sum of its proper divisors (1959531).

13716661 is an equidigital number, since it uses as much as digits as its factorization.

13716661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959530.

The product of its digits is 4536, while the sum is 31.

The square root of 13716661 is about 3703.6010854302. The cubic root of 13716661 is about 239.3772105180.

The spelling of 13716661 in words is "thirteen million, seven hundred sixteen thousand, six hundred sixty-one".