866763546740437 has 2 divisors, whose sum is σ = 866763546740438. Its totient is φ = 866763546740436.

The previous prime is 866763546740431. The next prime is 866763546740447. The reversal of 866763546740437 is 734047645367668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 567289930986801 + 299473615753636 = 23817849^2 + 17305306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866763546740437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866763546740431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433381773370218 + 433381773370219.

It is an arithmetic number, because the mean of its divisors is an integer number (433381773370219).

Almost surely, 2^{866763546740437} is an apocalyptic number.

It is an amenable number.

866763546740437 is a deficient number, since it is larger than the sum of its proper divisors (1).

866763546740437 is an equidigital number, since it uses as much as digits as its factorization.

866763546740437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10241925120, while the sum is 76.

The spelling of 866763546740437 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, five hundred forty-six million, seven hundred forty thousand, four hundred thirty-seven".