8816645687 has 2 divisors, whose sum is σ = 8816645688. Its totient is φ = 8816645686.

The previous prime is 8816645681. The next prime is 8816645857. The reversal of 8816645687 is 7865466188.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8816645687 - 2⁴ = 8816645671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8816645681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4408322843 + 4408322844.

It is an arithmetic number, because the mean of its divisors is an integer number (4408322844).

Almost surely, 2^8816645687 is an apocalyptic number.

8816645687 is a deficient number, since it is larger than the sum of its proper divisors (1).

8816645687 is an equidigital number, since it uses as much as digits as its factorization.

8816645687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 59.

The square root of 8816645687 is about 93896.9950903648. The cubic root of 8816645687 is about 2065.8611543115.

The spelling of 8816645687 in words is "eight billion, eight hundred sixteen million, six hundred forty-five thousand, six hundred eighty-seven".