866441300568139 has 2 divisors, whose sum is σ = 866441300568140. Its totient is φ = 866441300568138.

The previous prime is 866441300568131. The next prime is 866441300568149. The reversal of 866441300568139 is 931865003144668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866441300568139 - 2³ = 866441300568131 is a prime.

It is not a weakly prime, because it can be changed into another prime (866441300568131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433220650284069 + 433220650284070.

It is an arithmetic number, because the mean of its divisors is an integer number (433220650284070).

Almost surely, 2^{866441300568139} is an apocalyptic number.

866441300568139 is a deficient number, since it is larger than the sum of its proper divisors (1).

866441300568139 is an equidigital number, since it uses as much as digits as its factorization.

866441300568139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89579520, while the sum is 64.

The spelling of 866441300568139 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, three hundred million, five hundred sixty-eight thousand, one hundred thirty-nine".