660688824979 has 2 divisors, whose sum is σ = 660688824980. Its totient is φ = 660688824978.

The previous prime is 660688824937. The next prime is 660688825037. The reversal of 660688824979 is 979428886066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660688824979 - 2²⁹ = 660151954067 is a prime.

It is not a weakly prime, because it can be changed into another prime (660688824919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330344412489 + 330344412490.

It is an arithmetic number, because the mean of its divisors is an integer number (330344412490).

Almost surely, 2^660688824979 is an apocalyptic number.

660688824979 is a deficient number, since it is larger than the sum of its proper divisors (1).

660688824979 is an equidigital number, since it uses as much as digits as its factorization.

660688824979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501645312, while the sum is 73.

The spelling of 660688824979 in words is "six hundred sixty billion, six hundred eighty-eight million, eight hundred twenty-four thousand, nine hundred seventy-nine".