66327072118021 has 16 divisors (see below), whose sum is σ = 77924804041728. Its totient is φ = 55657588680000.

The previous prime is 66327072118007. The next prime is 66327072118031. The reversal of 66327072118021 is 12081127072366.

It is a cyclic number.

It is not a de Polignac number, because 66327072118021 - 2²⁹ = 66326535247109 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 (66327072118031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853605 + ... + 11549146.

It is an arithmetic number, because the mean of its divisors is an integer number (4870300252608).

Almost surely, 2^{66327072118021} is an apocalyptic number.

It is an amenable number.

66327072118021 is a deficient number, since it is larger than the sum of its proper divisors (11597731923707).

66327072118021 is a wasteful number, since it uses less digits than its factorization.

66327072118021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12440172.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 66327072118021 in words is "sixty-six trillion, three hundred twenty-seven billion, seventy-two million, one hundred eighteen thousand, twenty-one".