66215338332983 has 24 divisors (see below), whose sum is σ = 77103795197520. Its totient is φ = 56698706937600.

The previous prime is 66215338332947. The next prime is 66215338333003. The reversal of 66215338332983 is 38923383351266.

It is not a de Polignac number, because 66215338332983 - 2⁸ = 66215338332727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66215338332883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268833935 + ... + 269080127.

It is an arithmetic number, because the mean of its divisors is an integer number (3212658133230).

Almost surely, 2^{66215338332983} is an apocalyptic number.

66215338332983 is a deficient number, since it is larger than the sum of its proper divisors (10888456864537).

66215338332983 is a wasteful number, since it uses less digits than its factorization.

66215338332983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251727 (or 251720 counting only the distinct ones).

The product of its digits is 100776960, while the sum is 62.

The spelling of 66215338332983 in words is "sixty-six trillion, two hundred fifteen billion, three hundred thirty-eight million, three hundred thirty-two thousand, nine hundred eighty-three".