866722783373 has 2 divisors, whose sum is σ = 866722783374. Its totient is φ = 866722783372.

The previous prime is 866722783349. The next prime is 866722783387. The reversal of 866722783373 is 373387227668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799876232164 + 66846551209 = 894358^2 + 258547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866722783373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866722753373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433361391686 + 433361391687.

It is an arithmetic number, because the mean of its divisors is an integer number (433361391687).

Almost surely, 2^866722783373 is an apocalyptic number.

It is an amenable number.

866722783373 is a deficient number, since it is larger than the sum of its proper divisors (1).

866722783373 is an equidigital number, since it uses as much as digits as its factorization.

866722783373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85349376, while the sum is 62.

The spelling of 866722783373 in words is "eight hundred sixty-six billion, seven hundred twenty-two million, seven hundred eighty-three thousand, three hundred seventy-three".