660068436454243 has 2 divisors, whose sum is σ = 660068436454244. Its totient is φ = 660068436454242.

The previous prime is 660068436454211. The next prime is 660068436454289. The reversal of 660068436454243 is 342454634860066.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660068436454243 - 2⁵ = 660068436454211 is a prime.

It is not a weakly prime, because it can be changed into another prime (660068436454543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330034218227121 + 330034218227122.

It is an arithmetic number, because the mean of its divisors is an integer number (330034218227122).

Almost surely, 2^{660068436454243} is an apocalyptic number.

660068436454243 is a deficient number, since it is larger than the sum of its proper divisors (1).

660068436454243 is an equidigital number, since it uses as much as digits as its factorization.

660068436454243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238878720, while the sum is 61.

The spelling of 660068436454243 in words is "six hundred sixty trillion, sixty-eight billion, four hundred thirty-six million, four hundred fifty-four thousand, two hundred forty-three".