8663085691 has 16 divisors (see below), whose sum is σ = 9536304960. Its totient is φ = 7820392320.

The previous prime is 8663085689. The next prime is 8663085707. The reversal of 8663085691 is 1965803668.

It is not a de Polignac number, because 8663085691 - 2¹ = 8663085689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8663085091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194065 + ... + 234493.

It is an arithmetic number, because the mean of its divisors is an integer number (596019060).

Almost surely, 2^8663085691 is an apocalyptic number.

8663085691 is a deficient number, since it is larger than the sum of its proper divisors (873219269).

8663085691 is a wasteful number, since it uses less digits than its factorization.

8663085691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40806.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 8663085691 is about 93075.6987134666. The cubic root of 8663085691 is about 2053.7971021730.

The spelling of 8663085691 in words is "eight billion, six hundred sixty-three million, eighty-five thousand, six hundred ninety-one".