628667766827 has 2 divisors, whose sum is σ = 628667766828. Its totient is φ = 628667766826.

The previous prime is 628667766803. The next prime is 628667766829. The reversal of 628667766827 is 728667766826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628667766827 - 2²⁶ = 628600657963 is a prime.

It is a super-2 number, since 2×628667766827² (a number of 24 digits) contains 22 as substring.

Together with 628667766829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628667766829) 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, 314333883413 + 314333883414.

It is an arithmetic number, because the mean of its divisors is an integer number (314333883414).

Almost surely, 2^628667766827 is an apocalyptic number.

628667766827 is a deficient number, since it is larger than the sum of its proper divisors (1).

628667766827 is an equidigital number, since it uses as much as digits as its factorization.

628667766827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 682795008, while the sum is 71.

Subtracting 628667766827 from its reverse (728667766826), we obtain a palindrome (99999999999).

The spelling of 628667766827 in words is "six hundred twenty-eight billion, six hundred sixty-seven million, seven hundred sixty-six thousand, eight hundred twenty-seven".