667388883779 has 2 divisors, whose sum is σ = 667388883780. Its totient is φ = 667388883778.

The previous prime is 667388883769. The next prime is 667388883817. The reversal of 667388883779 is 977388883766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667388883779 - 2³⁶ = 598669407043 is a prime.

It is not a weakly prime, because it can be changed into another prime (667388883719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333694441889 + 333694441890.

It is an arithmetic number, because the mean of its divisors is an integer number (333694441890).

Almost surely, 2^667388883779 is an apocalyptic number.

667388883779 is a deficient number, since it is larger than the sum of its proper divisors (1).

667388883779 is an equidigital number, since it uses as much as digits as its factorization.

667388883779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4096770048, while the sum is 80.

The spelling of 667388883779 in words is "six hundred sixty-seven billion, three hundred eighty-eight million, eight hundred eighty-three thousand, seven hundred seventy-nine".