866846161 has 2 divisors, whose sum is σ = 866846162. Its totient is φ = 866846160.

The previous prime is 866846143. The next prime is 866846179. The reversal of 866846161 is 161648668.

866846161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (866846143) and next prime (866846179).

It can be written as a sum of positive squares in only one way, i.e., 541260225 + 325585936 = 23265^2 + 18044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866846161 is a prime.

It is not a weakly prime, because it can be changed into another prime (866846191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433423080 + 433423081.

It is an arithmetic number, because the mean of its divisors is an integer number (433423081).

Almost surely, 2^866846161 is an apocalyptic number.

It is an amenable number.

866846161 is a deficient number, since it is larger than the sum of its proper divisors (1).

866846161 is an equidigital number, since it uses as much as digits as its factorization.

866846161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 866846161 is about 29442.2512896008. The cubic root of 866846161 is about 953.4853179886.

The spelling of 866846161 in words is "eight hundred sixty-six million, eight hundred forty-six thousand, one hundred sixty-one".