6628564807 has 2 divisors, whose sum is σ = 6628564808. Its totient is φ = 6628564806.

The previous prime is 6628564781. The next prime is 6628564847. The reversal of 6628564807 is 7084658266.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6628564807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6628564847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314282403 + 3314282404.

It is an arithmetic number, because the mean of its divisors is an integer number (3314282404).

Almost surely, 2^6628564807 is an apocalyptic number.

6628564807 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628564807 is an equidigital number, since it uses as much as digits as its factorization.

6628564807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The square root of 6628564807 is about 81415.9984708165. The cubic root of 6628564807 is about 1878.4796829657.

The spelling of 6628564807 in words is "six billion, six hundred twenty-eight million, five hundred sixty-four thousand, eight hundred seven".