12168516677 has 2 divisors, whose sum is σ = 12168516678. Its totient is φ = 12168516676.

The previous prime is 12168516629. The next prime is 12168516733. The reversal of 12168516677 is 77661586121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7169178241 + 4999338436 = 84671^2 + 70706^2 .

It is a cyclic number.

It is not a de Polignac number, because 12168516677 - 2⁸ = 12168516421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12168513677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6084258338 + 6084258339.

It is an arithmetic number, because the mean of its divisors is an integer number (6084258339).

Almost surely, 2^12168516677 is an apocalyptic number.

It is an amenable number.

12168516677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12168516677 is an equidigital number, since it uses as much as digits as its factorization.

12168516677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 50.

The spelling of 12168516677 in words is "twelve billion, one hundred sixty-eight million, five hundred sixteen thousand, six hundred seventy-seven".