866441300575231 has 2 divisors, whose sum is σ = 866441300575232. Its totient is φ = 866441300575230.

The previous prime is 866441300575229. The next prime is 866441300575259. The reversal of 866441300575231 is 132575003144668.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866441300575231 - 2¹ = 866441300575229 is a prime.

It is a super-2 number, since 2×866441300575231² (a number of 31 digits) contains 22 as substring.

Together with 866441300575229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866441300573231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433220650287615 + 433220650287616.

It is an arithmetic number, because the mean of its divisors is an integer number (433220650287616).

Almost surely, 2^{866441300575231} is an apocalyptic number.

866441300575231 is a deficient number, since it is larger than the sum of its proper divisors (1).

866441300575231 is an equidigital number, since it uses as much as digits as its factorization.

866441300575231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 866441300575231 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, three hundred million, five hundred seventy-five thousand, two hundred thirty-one".