66777160013 has 2 divisors, whose sum is σ = 66777160014. Its totient is φ = 66777160012.

The previous prime is 66777160007. The next prime is 66777160027. The reversal of 66777160013 is 31006177766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58101727849 + 8675432164 = 241043^2 + 93142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66777160013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66777162013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33388580006 + 33388580007.

It is an arithmetic number, because the mean of its divisors is an integer number (33388580007).

Almost surely, 2^66777160013 is an apocalyptic number.

It is an amenable number.

66777160013 is a deficient number, since it is larger than the sum of its proper divisors (1).

66777160013 is an equidigital number, since it uses as much as digits as its factorization.

66777160013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 44.

The spelling of 66777160013 in words is "sixty-six billion, seven hundred seventy-seven million, one hundred sixty thousand, thirteen".