8666865 has 32 divisors (see below), whose sum is σ = 15776640. Its totient is φ = 4511808.

The previous prime is 8666863. The next prime is 8666881. The reversal of 8666865 is 5686668.

8666865 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 8666865 - 2¹ = 8666863 is a prime.

It is a super-2 number, since 2×8666865² = 150229097856450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8666865.

It is not an unprimeable number, because it can be changed into a prime (8666863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5059 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (493020).

Almost surely, 2^8666865 is an apocalyptic number.

It is an amenable number.

8666865 is a deficient number, since it is larger than the sum of its proper divisors (7109775).

8666865 is a wasteful number, since it uses less digits than its factorization.

8666865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 1544 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 8666865 is about 2943.9539738250. The cubic root of 8666865 is about 205.4095718074.

The spelling of 8666865 in words is "eight million, six hundred sixty-six thousand, eight hundred sixty-five".