8216566803 has 48 divisors (see below), whose sum is σ = 13113861120. Its totient is φ = 5082537600.

The previous prime is 8216566753. The next prime is 8216566861. The reversal of 8216566803 is 3086656128.

8216566803 is a `hidden beast` number, since 8 + 2 + 1 + 6 + 566 + 80 + 3 = 666.

8216566803 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8216566803 - 2¹² = 8216562707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8216568803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 546598 + ... + 561428.

It is an arithmetic number, because the mean of its divisors is an integer number (273205440).

Almost surely, 2^8216566803 is an apocalyptic number.

8216566803 is a deficient number, since it is larger than the sum of its proper divisors (4897294317).

8216566803 is a wasteful number, since it uses less digits than its factorization.

8216566803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14945 (or 14922 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 8216566803 is about 90645.2800922365. The cubic root of 8216566803 is about 2017.8867881016.

The spelling of 8216566803 in words is "eight billion, two hundred sixteen million, five hundred sixty-six thousand, eight hundred three".