666001233 has 48 divisors (see below), whose sum is σ = 1019506176. Its totient is φ = 418504320.

The previous prime is 666001207. The next prime is 666001247. The reversal of 666001233 is 332100666.

It is not a de Polignac number, because 666001233 - 2⁵ = 666001201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666001197 and 666001206.

It is not an unprimeable number, because it can be changed into a prime (666006233) 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 47 ways as a sum of consecutive naturals, for example, 1367316 + ... + 1367802.

It is an arithmetic number, because the mean of its divisors is an integer number (21239712).

Almost surely, 2^666001233 is an apocalyptic number.

It is an amenable number.

666001233 is a deficient number, since it is larger than the sum of its proper divisors (353504943).

666001233 is a wasteful number, since it uses less digits than its factorization.

666001233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 666001233 is about 25806.9996900066. Note that the first 3 decimals coincide. The cubic root of 666001233 is about 873.2897130510.

Adding to 666001233 its reverse (332100666), we get a palindrome (998101899).

The spelling of 666001233 in words is "six hundred sixty-six million, one thousand, two hundred thirty-three".