666664333 has 6 divisors (see below), whose sum is σ = 708186986. Its totient is φ = 627448512.

The previous prime is 666664321. The next prime is 666664363. The reversal of 666664333 is 333466666.

It can be written as a sum of positive squares in 3 ways, for example, as 121815369 + 544848964 = 11037^2 + 23342^2 .

It is not a de Polignac number, because 666664333 - 2⁵ = 666664301 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 666664333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666664363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1153110 + ... + 1153687.

Almost surely, 2^666664333 is an apocalyptic number.

It is an amenable number.

666664333 is a deficient number, since it is larger than the sum of its proper divisors (41522653).

666664333 is a wasteful number, since it uses less digits than its factorization.

666664333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306831 (or 2306814 counting only the distinct ones).

The product of its digits is 839808, while the sum is 43.

The square root of 666664333 is about 25819.8437834159. The cubic root of 666664333 is about 873.5794454123.

The spelling of 666664333 in words is "six hundred sixty-six million, six hundred sixty-four thousand, three hundred thirty-three".