866833338677 has 2 divisors, whose sum is σ = 866833338678. Its totient is φ = 866833338676.

The previous prime is 866833338659. The next prime is 866833338691. The reversal of 866833338677 is 776833338668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 731899071121 + 134934267556 = 855511^2 + 367334^2 .

It is a cyclic number.

It is not a de Polignac number, because 866833338677 - 2¹⁰ = 866833337653 is a prime.

It is a super-2 number, since 2×866833338677² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866833338977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433416669338 + 433416669339.

It is an arithmetic number, because the mean of its divisors is an integer number (433416669339).

Almost surely, 2^866833338677 is an apocalyptic number.

It is an amenable number.

866833338677 is a deficient number, since it is larger than the sum of its proper divisors (1).

866833338677 is an equidigital number, since it uses as much as digits as its factorization.

866833338677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 438939648, while the sum is 68.

Subtracting from 866833338677 its reverse (776833338668), we obtain a palindrome (90000000009).

The spelling of 866833338677 in words is "eight hundred sixty-six billion, eight hundred thirty-three million, three hundred thirty-eight thousand, six hundred seventy-seven".