66223318513 has 24 divisors (see below), whose sum is σ = 74202040640. Its totient is φ = 59043837600.

The previous prime is 66223318507. The next prime is 66223318549. The reversal of 66223318513 is 31581332266.

It is a de Polignac number, because none of the positive numbers 2^k-66223318513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66223318913) 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 23 ways as a sum of consecutive naturals, for example, 1838668 + ... + 1874338.

Almost surely, 2^66223318513 is an apocalyptic number.

It is an amenable number.

66223318513 is a deficient number, since it is larger than the sum of its proper divisors (7978722127).

66223318513 is a wasteful number, since it uses less digits than its factorization.

66223318513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35989 (or 35978 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The spelling of 66223318513 in words is "sixty-six billion, two hundred twenty-three million, three hundred eighteen thousand, five hundred thirteen".