666032331 has 16 divisors (see below), whose sum is σ = 921231360. Its totient is φ = 427702080.

The previous prime is 666032317. The next prime is 666032351. The reversal of 666032331 is 133230666.

It is not a de Polignac number, because 666032331 - 2⁶ = 666032267 is a prime.

It is a super-2 number, since 2×666032331² = 887198131874587122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666032351) 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 15 ways as a sum of consecutive naturals, for example, 24555 + ... + 43988.

It is an arithmetic number, because the mean of its divisors is an integer number (57576960).

Almost surely, 2^666032331 is an apocalyptic number.

666032331 is a deficient number, since it is larger than the sum of its proper divisors (255199029).

666032331 is a wasteful number, since it uses less digits than its factorization.

666032331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68666.

The product of its (nonzero) digits is 11664, while the sum is 30.

The square root of 666032331 is about 25807.6021939273. The cubic root of 666032331 is about 873.3033051884.

Adding to 666032331 its reverse (133230666), we get a palindrome (799262997).

The spelling of 666032331 in words is "six hundred sixty-six million, thirty-two thousand, three hundred thirty-one".