668887560907 has 2 divisors, whose sum is σ = 668887560908. Its totient is φ = 668887560906.

The previous prime is 668887560851. The next prime is 668887560953. The reversal of 668887560907 is 709065788866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668887560907 - 2⁷ = 668887560779 is a prime.

It is a super-2 number, since 2×668887560907² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (668887560977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334443780453 + 334443780454.

It is an arithmetic number, because the mean of its divisors is an integer number (334443780454).

Almost surely, 2^668887560907 is an apocalyptic number.

668887560907 is a deficient number, since it is larger than the sum of its proper divisors (1).

668887560907 is an equidigital number, since it uses as much as digits as its factorization.

668887560907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243855360, while the sum is 70.

The spelling of 668887560907 in words is "six hundred sixty-eight billion, eight hundred eighty-seven million, five hundred sixty thousand, nine hundred seven".