8216590866 has 32 divisors (see below), whose sum is σ = 17939361600. Its totient is φ = 2488174080.

The previous prime is 8216590853. The next prime is 8216590867. The reversal of 8216590866 is 6680956128.

It is not an unprimeable number, because it can be changed into a prime (8216590867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56470 + ... + 140078.

It is an arithmetic number, because the mean of its divisors is an integer number (560605050).

Almost surely, 2^8216590866 is an apocalyptic number.

8216590866 is an abundant number, since it is smaller than the sum of its proper divisors (9722770734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8216590866 is a wasteful number, since it uses less digits than its factorization.

8216590866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85114.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 8216590866 is about 90645.4128238159. The cubic root of 8216590866 is about 2017.8887579577. Note that the first 3 decimals are identical.

The spelling of 8216590866 in words is "eight billion, two hundred sixteen million, five hundred ninety thousand, eight hundred sixty-six".