66661652432331 has 12 divisors (see below), whose sum is σ = 105042603832920. Its totient is φ = 40401001474080.

The previous prime is 66661652432273. The next prime is 66661652432351. The reversal of 66661652432331 is 13323425616666.

It is not a de Polignac number, because 66661652432331 - 2¹⁴ = 66661652415947 is a prime.

It is a super-2 number, since 2×66661652432331² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66661652432351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336675012186 + ... + 336675012383.

It is an arithmetic number, because the mean of its divisors is an integer number (8753550319410).

Almost surely, 2^{66661652432331} is an apocalyptic number.

66661652432331 is a deficient number, since it is larger than the sum of its proper divisors (38380951400589).

66661652432331 is a wasteful number, since it uses less digits than its factorization.

66661652432331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673350024586 (or 673350024583 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 54.

The spelling of 66661652432331 in words is "sixty-six trillion, six hundred sixty-one billion, six hundred fifty-two million, four hundred thirty-two thousand, three hundred thirty-one".