66539238363 has 48 divisors (see below), whose sum is σ = 109200698880. Its totient is φ = 38703966912.

The previous prime is 66539238361. The next prime is 66539238383. The reversal of 66539238363 is 36383293566.

66539238363 is a `hidden beast` number, since 6 + 6 + 539 + 23 + 83 + 6 + 3 = 666.

It is not a de Polignac number, because 66539238363 - 2¹ = 66539238361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66539238361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 951006 + ... + 1018572.

It is an arithmetic number, because the mean of its divisors is an integer number (2275014560).

Almost surely, 2^66539238363 is an apocalyptic number.

66539238363 is a deficient number, since it is larger than the sum of its proper divisors (42661460517).

66539238363 is a wasteful number, since it uses less digits than its factorization.

66539238363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68048 (or 68045 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 54.

The spelling of 66539238363 in words is "sixty-six billion, five hundred thirty-nine million, two hundred thirty-eight thousand, three hundred sixty-three".