866788805310601 has 2 divisors, whose sum is σ = 866788805310602. Its totient is φ = 866788805310600.

The previous prime is 866788805310587. The next prime is 866788805310611. The reversal of 866788805310601 is 106013508887668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 673530180051600 + 193258625259001 = 25952460^2 + 13901749^2 .

It is a cyclic number.

It is not a de Polignac number, because 866788805310601 - 2⁵ = 866788805310569 is a prime.

It is not a weakly prime, because it can be changed into another prime (866788805310611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433394402655300 + 433394402655301.

It is an arithmetic number, because the mean of its divisors is an integer number (433394402655301).

Almost surely, 2^{866788805310601} is an apocalyptic number.

It is an amenable number.

866788805310601 is a deficient number, since it is larger than the sum of its proper divisors (1).

866788805310601 is an equidigital number, since it uses as much as digits as its factorization.

866788805310601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92897280, while the sum is 67.

The spelling of 866788805310601 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, eight hundred five million, three hundred ten thousand, six hundred one".