66733868570113 has 2 divisors, whose sum is σ = 66733868570114. Its totient is φ = 66733868570112.

The previous prime is 66733868570111. The next prime is 66733868570123. The reversal of 66733868570113 is 31107586833766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66732038185024 + 1830385089 = 8168968^2 + 42783^2 .

It is a cyclic number.

It is not a de Polignac number, because 66733868570113 - 2¹ = 66733868570111 is a prime.

Together with 66733868570111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66733868570111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33366934285056 + 33366934285057.

It is an arithmetic number, because the mean of its divisors is an integer number (33366934285057).

Almost surely, 2^{66733868570113} is an apocalyptic number.

It is an amenable number.

66733868570113 is a deficient number, since it is larger than the sum of its proper divisors (1).

66733868570113 is an equidigital number, since it uses as much as digits as its factorization.

66733868570113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 64.

The spelling of 66733868570113 in words is "sixty-six trillion, seven hundred thirty-three billion, eight hundred sixty-eight million, five hundred seventy thousand, one hundred thirteen".