66321222705727 has 4 divisors (see below), whose sum is σ = 72350424769896. Its totient is φ = 60292020641560.

The previous prime is 66321222705719. The next prime is 66321222705763. The reversal of 66321222705727 is 72750722212366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66321222705727 - 2³ = 66321222705719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66321222703727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014601032068 + ... + 3014601032089.

It is an arithmetic number, because the mean of its divisors is an integer number (18087606192474).

Almost surely, 2^{66321222705727} is an apocalyptic number.

66321222705727 is a deficient number, since it is larger than the sum of its proper divisors (6029202064169).

66321222705727 is a wasteful number, since it uses less digits than its factorization.

66321222705727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6029202064168.

The product of its (nonzero) digits is 5927040, while the sum is 52.

The spelling of 66321222705727 in words is "sixty-six trillion, three hundred twenty-one billion, two hundred twenty-two million, seven hundred five thousand, seven hundred twenty-seven".