866306061 has 12 divisors (see below), whose sum is σ = 1259303292. Its totient is φ = 573857856.

The previous prime is 866306059. The next prime is 866306081. The reversal of 866306061 is 160603668.

It can be written as a sum of positive squares in 2 ways, for example, as 613305225 + 253000836 = 24765^2 + 15906^2 .

It is not a de Polignac number, because 866306061 - 2¹ = 866306059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866306081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305136 + ... + 307961.

It is an arithmetic number, because the mean of its divisors is an integer number (104941941).

Almost surely, 2^866306061 is an apocalyptic number.

It is an amenable number.

866306061 is a deficient number, since it is larger than the sum of its proper divisors (392997231).

866306061 is a wasteful number, since it uses less digits than its factorization.

866306061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613260 (or 613257 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 866306061 is about 29433.0776678213. The cubic root of 866306061 is about 953.2872496211.

The spelling of 866306061 in words is "eight hundred sixty-six million, three hundred six thousand, sixty-one".