66333261330313 has 2 divisors, whose sum is σ = 66333261330314. Its totient is φ = 66333261330312.

The previous prime is 66333261330299. The next prime is 66333261330383. The reversal of 66333261330313 is 31303316233366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58336401281929 + 7996860048384 = 7637827^2 + 2827872^2 .

It is a cyclic number.

It is not a de Polignac number, because 66333261330313 - 2²¹ = 66333259233161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66333261330313.

It is not a weakly prime, because it can be changed into another prime (66333261330383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33166630665156 + 33166630665157.

It is an arithmetic number, because the mean of its divisors is an integer number (33166630665157).

Almost surely, 2^{66333261330313} is an apocalyptic number.

It is an amenable number.

66333261330313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66333261330313 is an equidigital number, since it uses as much as digits as its factorization.

66333261330313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 43.

Adding to 66333261330313 its reverse (31303316233366), we get a palindrome (97636577563679).

The spelling of 66333261330313 in words is "sixty-six trillion, three hundred thirty-three billion, two hundred sixty-one million, three hundred thirty thousand, three hundred thirteen".