8320987663 has 4 divisors (see below), whose sum is σ = 8514499048. Its totient is φ = 8127476280.

The previous prime is 8320987643. The next prime is 8320987673. The reversal of 8320987663 is 3667890238.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8320987663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8320987663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8320987643) 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, 96755628 + ... + 96755713.

It is an arithmetic number, because the mean of its divisors is an integer number (2128624762).

Almost surely, 2^8320987663 is an apocalyptic number.

8320987663 is a deficient number, since it is larger than the sum of its proper divisors (193511385).

8320987663 is a wasteful number, since it uses less digits than its factorization.

8320987663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193511384.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The square root of 8320987663 is about 91219.4478332335. The cubic root of 8320987663 is about 2026.3989855621.

The spelling of 8320987663 in words is "eight billion, three hundred twenty million, nine hundred eighty-seven thousand, six hundred sixty-three".