66501060616717 has 8 divisors (see below), whose sum is σ = 70422225188472. Its totient is φ = 62580933542400.

The previous prime is 66501060616703. The next prime is 66501060616747. The reversal of 66501060616717 is 71761606010566.

66501060616717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12785852184361 + 53715208432356 = 3575731^2 + 7329066^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66501060616717 - 2¹⁹ = 66501060092429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66501060616747) 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 in 7 ways as a sum of consecutive naturals, for example, 259242384 + ... + 259498777.

It is an arithmetic number, because the mean of its divisors is an integer number (8802778148559).

Almost surely, 2^{66501060616717} is an apocalyptic number.

It is an amenable number.

66501060616717 is a deficient number, since it is larger than the sum of its proper divisors (3921164571755).

66501060616717 is a wasteful number, since it uses less digits than its factorization.

66501060616717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518748719.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 66501060616717 in words is "sixty-six trillion, five hundred one billion, sixty million, six hundred sixteen thousand, seven hundred seventeen".