666666333 has 12 divisors (see below), whose sum is σ = 988988988. Its totient is φ = 432432000.

The previous prime is 666666323. The next prime is 666666349. The reversal of 666666333 is 333666666.

It can be written as a sum of positive squares in 2 ways, for example, as 225540324 + 441126009 = 15018^2 + 21003^2 .

It is not a de Polignac number, because 666666333 - 2⁹ = 666665821 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666666323) 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 11 ways as a sum of consecutive naturals, for example, 1000668 + ... + 1001333.

It is an arithmetic number, because the mean of its divisors is an integer number (82415749).

Almost surely, 2^666666333 is an apocalyptic number.

It is an amenable number.

666666333 is a deficient number, since it is larger than the sum of its proper divisors (322322655).

666666333 is a wasteful number, since it uses less digits than its factorization.

666666333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002044 (or 2002041 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 45.

The square root of 666666333 is about 25819.8825132881. The cubic root of 666666333 is about 873.5803189939.

The spelling of 666666333 in words is "six hundred sixty-six million, six hundred sixty-six thousand, three hundred thirty-three".