66044140313 has 2 divisors, whose sum is σ = 66044140314. Its totient is φ = 66044140312.

The previous prime is 66044140297. The next prime is 66044140343. The reversal of 66044140313 is 31304144066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38464231129 + 27579909184 = 196123^2 + 166072^2 .

It is a cyclic number.

It is not a de Polignac number, because 66044140313 - 2⁴ = 66044140297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66044140313.

It is not a weakly prime, because it can be changed into another prime (66044140343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33022070156 + 33022070157.

It is an arithmetic number, because the mean of its divisors is an integer number (33022070157).

Almost surely, 2^66044140313 is an apocalyptic number.

It is an amenable number.

66044140313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66044140313 is an equidigital number, since it uses as much as digits as its factorization.

66044140313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 66044140313 its reverse (31304144066), we get a palindrome (97348284379).

The spelling of 66044140313 in words is "sixty-six billion, forty-four million, one hundred forty thousand, three hundred thirteen".