668832822577 has 2 divisors, whose sum is σ = 668832822578. Its totient is φ = 668832822576.

The previous prime is 668832822521. The next prime is 668832822611. The reversal of 668832822577 is 775228238866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618387213376 + 50445609201 = 786376^2 + 224601^2 .

It is a cyclic number.

It is not a de Polignac number, because 668832822577 - 2³¹ = 666685338929 is a prime.

It is not a weakly prime, because it can be changed into another prime (668832822377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334416411288 + 334416411289.

It is an arithmetic number, because the mean of its divisors is an integer number (334416411289).

Almost surely, 2^668832822577 is an apocalyptic number.

It is an amenable number.

668832822577 is a deficient number, since it is larger than the sum of its proper divisors (1).

668832822577 is an equidigital number, since it uses as much as digits as its factorization.

668832822577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108380160, while the sum is 64.

The spelling of 668832822577 in words is "six hundred sixty-eight billion, eight hundred thirty-two million, eight hundred twenty-two thousand, five hundred seventy-seven".