66364060312489 has 2 divisors, whose sum is σ = 66364060312490. Its totient is φ = 66364060312488.

The previous prime is 66364060312471. The next prime is 66364060312523. The reversal of 66364060312489 is 98421306046366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65981260723225 + 382799589264 = 8122885^2 + 618708^2 .

It is a cyclic number.

It is not a de Polignac number, because 66364060312489 - 2¹¹ = 66364060310441 is a prime.

It is not a weakly prime, because it can be changed into another prime (66364060312189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33182030156244 + 33182030156245.

It is an arithmetic number, because the mean of its divisors is an integer number (33182030156245).

Almost surely, 2^{66364060312489} is an apocalyptic number.

It is an amenable number.

66364060312489 is a deficient number, since it is larger than the sum of its proper divisors (1).

66364060312489 is an equidigital number, since it uses as much as digits as its factorization.

66364060312489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26873856, while the sum is 58.

The spelling of 66364060312489 in words is "sixty-six trillion, three hundred sixty-four billion, sixty million, three hundred twelve thousand, four hundred eighty-nine".