66718082297 has 2 divisors, whose sum is σ = 66718082298. Its totient is φ = 66718082296.

The previous prime is 66718082251. The next prime is 66718082317. The reversal of 66718082297 is 79228081766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39573542761 + 27144539536 = 198931^2 + 164756^2 .

It is a cyclic number.

It is not a de Polignac number, because 66718082297 - 2¹⁴ = 66718065913 is a prime.

It is not a weakly prime, because it can be changed into another prime (66718022297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33359041148 + 33359041149.

It is an arithmetic number, because the mean of its divisors is an integer number (33359041149).

Almost surely, 2^66718082297 is an apocalyptic number.

It is an amenable number.

66718082297 is a deficient number, since it is larger than the sum of its proper divisors (1).

66718082297 is an equidigital number, since it uses as much as digits as its factorization.

66718082297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 66718082297 in words is "sixty-six billion, seven hundred eighteen million, eighty-two thousand, two hundred ninety-seven".