13666311 has 12 divisors (see below), whose sum is σ = 19922760. Its totient is φ = 9026640.

The previous prime is 13666309. The next prime is 13666321. The reversal of 13666311 is 11366631.

It is a happy number.

It is not a de Polignac number, because 13666311 - 2¹ = 13666309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13666321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5985 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (1660230).

Almost surely, 2^13666311 is an apocalyptic number.

13666311 is a deficient number, since it is larger than the sum of its proper divisors (6256449).

13666311 is a wasteful number, since it uses less digits than its factorization.

13666311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14046 (or 14043 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 13666311 is about 3696.7973977485. The cubic root of 13666311 is about 239.0839559623.

The spelling of 13666311 in words is "thirteen million, six hundred sixty-six thousand, three hundred eleven".