666331752 has 16 divisors (see below), whose sum is σ = 1665829440. Its totient is φ = 222110576.

The previous prime is 666331747. The next prime is 666331759. The reversal of 666331752 is 257133666.

It is a self number, because there is not a number n which added to its sum of digits gives 666331752.

It is not an unprimeable number, because it can be changed into a prime (666331759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13881888 + ... + 13881935.

It is an arithmetic number, because the mean of its divisors is an integer number (104114340).

Almost surely, 2^666331752 is an apocalyptic number.

It is an amenable number.

666331752 is an abundant number, since it is smaller than the sum of its proper divisors (999497688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666331752 is a wasteful number, since it uses less digits than its factorization.

666331752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27763832 (or 27763828 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

The square root of 666331752 is about 25813.4025653342. The cubic root of 666331752 is about 873.4341527775.

The spelling of 666331752 in words is "six hundred sixty-six million, three hundred thirty-one thousand, seven hundred fifty-two".