13666031 has 2 divisors, whose sum is σ = 13666032. Its totient is φ = 13666030.

The previous prime is 13666027. The next prime is 13666067. The reversal of 13666031 is 13066631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13666031 - 2² = 13666027 is a prime.

It is a super-2 number, since 2×13666031² = 373520806585922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13666021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6833015 + 6833016.

It is an arithmetic number, because the mean of its divisors is an integer number (6833016).

Almost surely, 2^13666031 is an apocalyptic number.

13666031 is a deficient number, since it is larger than the sum of its proper divisors (1).

13666031 is an equidigital number, since it uses as much as digits as its factorization.

13666031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13666031 is about 3696.7595269371. The cubic root of 13666031 is about 239.0823231401.

The spelling of 13666031 in words is "thirteen million, six hundred sixty-six thousand, thirty-one".