8666866 has 8 divisors (see below), whose sum is σ = 14000364. Its totient is φ = 4000080.

The previous prime is 8666863. The next prime is 8666881. The reversal of 8666866 is 6686668.

8666866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8288641 + 378225 = 2879^2 + 615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8666866² = 150229132523912, which contains 22 as substring.

It is a plaindrome in base 7.

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 3 ways as a sum of consecutive naturals, for example, 166645 + ... + 166696.

Almost surely, 2^8666866 is an apocalyptic number.

8666866 is a deficient number, since it is larger than the sum of its proper divisors (5333498).

8666866 is a wasteful number, since it uses less digits than its factorization.

8666866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333356.

The product of its digits is 497664, while the sum is 46.

The square root of 8666866 is about 2943.9541436646. The cubic root of 8666866 is about 205.4095797076.

The spelling of 8666866 in words is "eight million, six hundred sixty-six thousand, eight hundred sixty-six".