8686663 has 4 divisors (see below), whose sum is σ = 9064368. Its totient is φ = 8308960.

The previous prime is 8686661. The next prime is 8686669. The reversal of 8686663 is 3666868.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8686663 - 2¹ = 8686661 is a prime.

It is a super-2 number, since 2×8686663² = 150916228151138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8686661) 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, 188818 + ... + 188863.

It is an arithmetic number, because the mean of its divisors is an integer number (2266092).

Almost surely, 2^8686663 is an apocalyptic number.

8686663 is a deficient number, since it is larger than the sum of its proper divisors (377705).

8686663 is a wasteful number, since it uses less digits than its factorization.

8686663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377704.

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

The square root of 8686663 is about 2947.3145403910. The cubic root of 8686663 is about 205.5658607717.

The spelling of 8686663 in words is "eight million, six hundred eighty-six thousand, six hundred sixty-three".