66960081589 has 16 divisors (see below), whose sum is σ = 68659937280. Its totient is φ = 65272117680.

The previous prime is 66960081577. The next prime is 66960081619. The reversal of 66960081589 is 98518006966.

It is a cyclic number.

It is not a de Polignac number, because 66960081589 - 2¹¹ = 66960079541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66960088589) 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 in 15 ways as a sum of consecutive naturals, for example, 24625372 + ... + 24628090.

It is an arithmetic number, because the mean of its divisors is an integer number (4291246080).

Almost surely, 2^66960081589 is an apocalyptic number.

It is an amenable number.

66960081589 is a deficient number, since it is larger than the sum of its proper divisors (1699855691).

66960081589 is a wasteful number, since it uses less digits than its factorization.

66960081589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 66960081589 in words is "sixty-six billion, nine hundred sixty million, eighty-one thousand, five hundred eighty-nine".