66385059841 has 8 divisors (see below), whose sum is σ = 68153032584. Its totient is φ = 64624174080.

The previous prime is 66385059817. The next prime is 66385059877. The reversal of 66385059841 is 14895058366.

It can be written as a sum of positive squares in 4 ways, for example, as 6006250000 + 60378809841 = 77500^2 + 245721^2 .

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 66385059841 - 2¹¹ = 66385057793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66385059641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1752760 + ... + 1790233.

It is an arithmetic number, because the mean of its divisors is an integer number (8519129073).

Almost surely, 2^66385059841 is an apocalyptic number.

It is an amenable number.

66385059841 is a deficient number, since it is larger than the sum of its proper divisors (1767972743).

66385059841 is a wasteful number, since it uses less digits than its factorization.

66385059841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543491.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 66385059841 in words is "sixty-six billion, three hundred eighty-five million, fifty-nine thousand, eight hundred forty-one".