866160046861 has 2 divisors, whose sum is σ = 866160046862. Its totient is φ = 866160046860.

The previous prime is 866160046837. The next prime is 866160046897. The reversal of 866160046861 is 168640061668.

It is a happy number.

866160046861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656950775625 + 209209271236 = 810525^2 + 457394^2 .

It is a cyclic number.

It is not a de Polignac number, because 866160046861 - 2⁷ = 866160046733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866160046799 and 866160046808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866160046811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433080023430 + 433080023431.

It is an arithmetic number, because the mean of its divisors is an integer number (433080023431).

Almost surely, 2^866160046861 is an apocalyptic number.

It is an amenable number.

866160046861 is a deficient number, since it is larger than the sum of its proper divisors (1).

866160046861 is an equidigital number, since it uses as much as digits as its factorization.

866160046861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 866160046861 in words is "eight hundred sixty-six billion, one hundred sixty million, forty-six thousand, eight hundred sixty-one".