866788526244773 has 6 divisors (see below), whose sum is σ = 952751024715462. Its totient is φ = 787989569313320.

The previous prime is 866788526244743. The next prime is 866788526244793. The reversal of 866788526244773 is 377442625887668.

It can be written as a sum of positive squares in only one way, i.e., 781045037635489 + 85743488609284 = 27947183^2 + 9259778^2 .

It is not a de Polignac number, because 866788526244773 - 2²² = 866788522050469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866788526244691 and 866788526244700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866788526244743) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3581770769486 + ... + 3581770769727.

It is an arithmetic number, because the mean of its divisors is an integer number (158791837452577).

Almost surely, 2^{866788526244773} is an apocalyptic number.

It is an amenable number.

866788526244773 is a deficient number, since it is larger than the sum of its proper divisors (85962498470689).

866788526244773 is a wasteful number, since it uses less digits than its factorization.

866788526244773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7163541539235 (or 7163541539224 counting only the distinct ones).

The product of its digits is 36415733760, while the sum is 83.

The spelling of 866788526244773 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, two hundred forty-four thousand, seven hundred seventy-three".