866760686880461 has 2 divisors, whose sum is σ = 866760686880462. Its totient is φ = 866760686880460.

The previous prime is 866760686880443. The next prime is 866760686880481. The reversal of 866760686880461 is 164088686067668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 459706618192900 + 407054068687561 = 21440770^2 + 20175581^2 .

It is a cyclic number.

It is not a de Polignac number, because 866760686880461 - 2¹⁴ = 866760686864077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866760686880421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433380343440230 + 433380343440231.

It is an arithmetic number, because the mean of its divisors is an integer number (433380343440231).

Almost surely, 2^{866760686880461} is an apocalyptic number.

It is an amenable number.

866760686880461 is a deficient number, since it is larger than the sum of its proper divisors (1).

866760686880461 is an equidigital number, since it uses as much as digits as its factorization.

866760686880461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5350883328, while the sum is 80.

The spelling of 866760686880461 in words is "eight hundred sixty-six trillion, seven hundred sixty billion, six hundred eighty-six million, eight hundred eighty thousand, four hundred sixty-one".