6628565687 has 2 divisors, whose sum is σ = 6628565688. Its totient is φ = 6628565686.

The previous prime is 6628565677. The next prime is 6628565743. The reversal of 6628565687 is 7865658266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6628565687 - 2⁶ = 6628565623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6628565677) 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 as a sum of consecutive naturals, namely, 3314282843 + 3314282844.

It is an arithmetic number, because the mean of its divisors is an integer number (3314282844).

Almost surely, 2^6628565687 is an apocalyptic number.

6628565687 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628565687 is an equidigital number, since it uses as much as digits as its factorization.

6628565687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 59.

The square root of 6628565687 is about 81416.0038751596. The cubic root of 6628565687 is about 1878.4797660939.

The spelling of 6628565687 in words is "six billion, six hundred twenty-eight million, five hundred sixty-five thousand, six hundred eighty-seven".