66501060616699 has 2 divisors, whose sum is σ = 66501060616700. Its totient is φ = 66501060616698.

The previous prime is 66501060616691. The next prime is 66501060616703. The reversal of 66501060616699 is 99661606010566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66501060616699 - 2³ = 66501060616691 is a prime.

It is a super-3 number, since 3×66501060616699³ (a number of 42 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (66501060616691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33250530308349 + 33250530308350.

It is an arithmetic number, because the mean of its divisors is an integer number (33250530308350).

Almost surely, 2^{66501060616699} is an apocalyptic number.

66501060616699 is a deficient number, since it is larger than the sum of its proper divisors (1).

66501060616699 is an equidigital number, since it uses as much as digits as its factorization.

66501060616699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18895680, while the sum is 61.

The spelling of 66501060616699 in words is "sixty-six trillion, five hundred one billion, sixty million, six hundred sixteen thousand, six hundred ninety-nine".