866436065 has 16 divisors (see below), whose sum is σ = 1134907200. Its totient is φ = 629766720.

The previous prime is 866436061. The next prime is 866436079. The reversal of 866436065 is 560634668.

866436065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866436065 - 2² = 866436061 is a prime.

It is a super-2 number, since 2×866436065² = 1501422909465368450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866436061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121211 + ... + 128159.

It is an arithmetic number, because the mean of its divisors is an integer number (70931700).

Almost surely, 2^866436065 is an apocalyptic number.

It is an amenable number.

866436065 is a deficient number, since it is larger than the sum of its proper divisors (268471135).

866436065 is a wasteful number, since it uses less digits than its factorization.

866436065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9232.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 866436065 is about 29435.2860526274. The cubic root of 866436065 is about 953.3349329063.

The spelling of 866436065 in words is "eight hundred sixty-six million, four hundred thirty-six thousand, sixty-five".