8666863 has 2 divisors, whose sum is σ = 8666864. Its totient is φ = 8666862.

The previous prime is 8666849. The next prime is 8666881. The reversal of 8666863 is 3686668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8666863 - 2⁹ = 8666351 is a prime.

It is a super-2 number, since 2×8666863² = 150229028521538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8660863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333431 + 4333432.

It is an arithmetic number, because the mean of its divisors is an integer number (4333432).

Almost surely, 2^8666863 is an apocalyptic number.

8666863 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666863 is an equidigital number, since it uses as much as digits as its factorization.

8666863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 8666863 is about 2943.9536341458. The cubic root of 8666863 is about 205.4095560070.

The spelling of 8666863 in words is "eight million, six hundred sixty-six thousand, eight hundred sixty-three".