666065063505643 has 2 divisors, whose sum is σ = 666065063505644. Its totient is φ = 666065063505642.

The previous prime is 666065063505613. The next prime is 666065063505733. The reversal of 666065063505643 is 346505360560666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666065063505643 is a prime.

It is not a weakly prime, because it can be changed into another prime (666065063505613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333032531752821 + 333032531752822.

It is an arithmetic number, because the mean of its divisors is an integer number (333032531752822).

Almost surely, 2^{666065063505643} is an apocalyptic number.

666065063505643 is a deficient number, since it is larger than the sum of its proper divisors (1).

666065063505643 is an equidigital number, since it uses as much as digits as its factorization.

666065063505643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952000, while the sum is 61.

The spelling of 666065063505643 in words is "six hundred sixty-six trillion, sixty-five billion, sixty-three million, five hundred five thousand, six hundred forty-three".