666333 has 32 divisors (see below), whose sum is σ = 1094400. Its totient is φ = 399168.

The previous prime is 666329. The next prime is 666353. The reversal of 666333 is 333666.

It is not a de Polignac number, because 666333 - 2² = 666329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 6⁶ + 6⁷ + 3³ + 6⁷ + 3⁶ + 3¹⁰ .

666333 is a lucky number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 666297 and 666306.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 666333.

It is not an unprimeable number, because it can be changed into a prime (666353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17991 + ... + 18027.

It is an arithmetic number, because the mean of its divisors is an integer number (34200).

2⁶⁶⁶³³³ is an apocalyptic number.

It is an amenable number.

666333 is a deficient number, since it is larger than the sum of its proper divisors (428067).

666333 is a wasteful number, since it uses less digits than its factorization.

666333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 92 counting only the distinct ones).

The product of its digits is 5832, while the sum is 27.

The square root of 666333 is about 816.2922270854. The cubic root of 666333 is about 87.3434698074.

Adding to 666333 its reverse (333666), we get a palindrome (999999).

It can be divided in two parts, 666 and 333, that added together give a palindrome (999).

The spelling of 666333 in words is "six hundred sixty-six thousand, three hundred thirty-three".