66675488813 has 2 divisors, whose sum is σ = 66675488814. Its totient is φ = 66675488812.

The previous prime is 66675488801. The next prime is 66675488819. The reversal of 66675488813 is 31888457666.

66675488813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62641079524 + 4034409289 = 250282^2 + 63517^2 .

It is a cyclic number.

It is not a de Polignac number, because 66675488813 - 2⁴ = 66675488797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66675488819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33337744406 + 33337744407.

It is an arithmetic number, because the mean of its divisors is an integer number (33337744407).

Almost surely, 2^66675488813 is an apocalyptic number.

It is an amenable number.

66675488813 is a deficient number, since it is larger than the sum of its proper divisors (1).

66675488813 is an equidigital number, since it uses as much as digits as its factorization.

66675488813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 62.

The spelling of 66675488813 in words is "sixty-six billion, six hundred seventy-five million, four hundred eighty-eight thousand, eight hundred thirteen".