866800082637061 has 2 divisors, whose sum is σ = 866800082637062. Its totient is φ = 866800082637060.

The previous prime is 866800082637037. The next prime is 866800082637121. The reversal of 866800082637061 is 160736280008668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 444533790960900 + 422266291676161 = 21083970^2 + 20549119^2 .

It is a cyclic number.

It is not a de Polignac number, because 866800082637061 - 2¹⁹ = 866800082112773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866800082637001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433400041318530 + 433400041318531.

It is an arithmetic number, because the mean of its divisors is an integer number (433400041318531).

Almost surely, 2^{866800082637061} is an apocalyptic number.

It is an amenable number.

866800082637061 is a deficient number, since it is larger than the sum of its proper divisors (1).

866800082637061 is an equidigital number, since it uses as much as digits as its factorization.

866800082637061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 866800082637061 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, six hundred thirty-seven thousand, sixty-one".