6628607897 has 2 divisors, whose sum is σ = 6628607898. Its totient is φ = 6628607896.

The previous prime is 6628607861. The next prime is 6628607929. The reversal of 6628607897 is 7987068266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3894259216 + 2734348681 = 62404^2 + 52291^2 .

It is a cyclic number.

It is not a de Polignac number, because 6628607897 - 2²⁰ = 6627559321 is a prime.

It is not a weakly prime, because it can be changed into another prime (6628607827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314303948 + 3314303949.

It is an arithmetic number, because the mean of its divisors is an integer number (3314303949).

Almost surely, 2^6628607897 is an apocalyptic number.

It is an amenable number.

6628607897 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628607897 is an equidigital number, since it uses as much as digits as its factorization.

6628607897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The square root of 6628607897 is about 81416.2630989657. The cubic root of 6628607897 is about 1878.4837534051.

The spelling of 6628607897 in words is "six billion, six hundred twenty-eight million, six hundred seven thousand, eight hundred ninety-seven".