8663665 has 8 divisors (see below), whose sum is σ = 10422720. Its totient is φ = 6913392.

The previous prime is 8663653. The next prime is 8663687. The reversal of 8663665 is 5663668.

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

It is a cyclic number.

It is not a de Polignac number, because 8663665 - 2⁷ = 8663537 is a prime.

8663665 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222 + ... + 4168.

It is an arithmetic number, because the mean of its divisors is an integer number (1302840).

Almost surely, 2^8663665 is an apocalyptic number.

It is an amenable number.

8663665 is a deficient number, since it is larger than the sum of its proper divisors (1759055).

8663665 is a wasteful number, since it uses less digits than its factorization.

8663665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391.

The product of its digits is 155520, while the sum is 40.

The square root of 8663665 is about 2943.4104368912. The cubic root of 8663665 is about 205.3842880959.

The spelling of 8663665 in words is "eight million, six hundred sixty-three thousand, six hundred sixty-five".