66143324305 has 12 divisors (see below), whose sum is σ = 83769331572. Its totient is φ = 50129676000.

The previous prime is 66143324297. The next prime is 66143324309. The reversal of 66143324305 is 50342334166.

It can be written as a sum of positive squares in 2 ways, for example, as 35181754624 + 30961569681 = 187568^2 + 175959^2 .

It is not a de Polignac number, because 66143324305 - 2³ = 66143324297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66143324309) 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 11 ways as a sum of consecutive naturals, for example, 18320446 + ... + 18324055.

It is an arithmetic number, because the mean of its divisors is an integer number (6980777631).

Almost surely, 2^66143324305 is an apocalyptic number.

It is an amenable number.

66143324305 is a deficient number, since it is larger than the sum of its proper divisors (17626007267).

66143324305 is a wasteful number, since it uses less digits than its factorization.

66143324305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36644544 (or 36644525 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 66143324305 in words is "sixty-six billion, one hundred forty-three million, three hundred twenty-four thousand, three hundred five".