8216665867 has 2 divisors, whose sum is σ = 8216665868. Its totient is φ = 8216665866.

The previous prime is 8216665861. The next prime is 8216665907. The reversal of 8216665867 is 7685666128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8216665867 - 2³¹ = 6069182219 is a prime.

It is not a weakly prime, because it can be changed into another prime (8216665861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108332933 + 4108332934.

It is an arithmetic number, because the mean of its divisors is an integer number (4108332934).

Almost surely, 2^8216665867 is an apocalyptic number.

8216665867 is a deficient number, since it is larger than the sum of its proper divisors (1).

8216665867 is an equidigital number, since it uses as much as digits as its factorization.

8216665867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 55.

The square root of 8216665867 is about 90645.8265283074. The cubic root of 8216665867 is about 2017.8948976985.

The spelling of 8216665867 in words is "eight billion, two hundred sixteen million, six hundred sixty-five thousand, eight hundred sixty-seven".