667388883769 has 2 divisors, whose sum is σ = 667388883770. Its totient is φ = 667388883768.

The previous prime is 667388883757. The next prime is 667388883779. The reversal of 667388883769 is 967388883766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558887817744 + 108501066025 = 747588^2 + 329395^2 .

It is a cyclic number.

It is not a de Polignac number, because 667388883769 - 2⁹ = 667388883257 is a prime.

It is a super-2 number, since 2×667388883769² (a number of 24 digits) contains 22 as substring.

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, 333694441884 + 333694441885.

It is an arithmetic number, because the mean of its divisors is an integer number (333694441885).

Almost surely, 2^667388883769 is an apocalyptic number.

It is an amenable number.

667388883769 is a deficient number, since it is larger than the sum of its proper divisors (1).

667388883769 is an equidigital number, since it uses as much as digits as its factorization.

667388883769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3511517184, while the sum is 79.

The spelling of 667388883769 in words is "six hundred sixty-seven billion, three hundred eighty-eight million, eight hundred eighty-three thousand, seven hundred sixty-nine".