666666889000039 has 2 divisors, whose sum is σ = 666666889000040. Its totient is φ = 666666889000038.

The previous prime is 666666888999961. The next prime is 666666889000087. The reversal of 666666889000039 is 930000988666666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666666889000039 - 2³¹ = 666664741516391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666666889000139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333333444500019 + 333333444500020.

It is an arithmetic number, because the mean of its divisors is an integer number (333333444500020).

Almost surely, 2^{666666889000039} is an apocalyptic number.

666666889000039 is a deficient number, since it is larger than the sum of its proper divisors (1).

666666889000039 is an equidigital number, since it uses as much as digits as its factorization.

666666889000039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725594112, while the sum is 73.

The spelling of 666666889000039 in words is "six hundred sixty-six trillion, six hundred sixty-six billion, eight hundred eighty-nine million, thirty-nine", and thus it is an aban number.