8663691 has 8 divisors (see below), whose sum is σ = 11566800. Its totient is φ = 5768192.

The previous prime is 8663687. The next prime is 8663701. The reversal of 8663691 is 1963668.

It is a happy number.

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 8663691 - 2² = 8663687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8663621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1771 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (1445850).

Almost surely, 2^8663691 is an apocalyptic number.

8663691 is a deficient number, since it is larger than the sum of its proper divisors (2903109).

8663691 is a wasteful number, since it uses less digits than its factorization.

8663691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805.

The product of its digits is 46656, while the sum is 39.

The square root of 8663691 is about 2943.4148535332. The cubic root of 8663691 is about 205.3844935511.

The spelling of 8663691 in words is "eight million, six hundred sixty-three thousand, six hundred ninety-one".