866940598877247 has 24 divisors (see below), whose sum is σ = 1270957986667824. Its totient is φ = 569325078774144.

The previous prime is 866940598877233. The next prime is 866940598877251. The reversal of 866940598877247 is 742778895049668.

866940598877247 is a `hidden beast` number, since 8 + 6 + 6 + 9 + 4 + 0 + 598 + 8 + 7 + 7 + 2 + 4 + 7 = 666.

It is not a de Polignac number, because 866940598877247 - 2³⁰ = 866939525135423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866940598877257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26667153 + ... + 49447125.

It is an arithmetic number, because the mean of its divisors is an integer number (52956582777826).

Almost surely, 2^{866940598877247} is an apocalyptic number.

866940598877247 is a deficient number, since it is larger than the sum of its proper divisors (404017387790577).

866940598877247 is a wasteful number, since it uses less digits than its factorization.

866940598877247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22843159 (or 22843156 counting only the distinct ones).

The product of its (nonzero) digits is 81935400960, while the sum is 90.

The spelling of 866940598877247 in words is "eight hundred sixty-six trillion, nine hundred forty billion, five hundred ninety-eight million, eight hundred seventy-seven thousand, two hundred forty-seven".