665233133 has 2 divisors, whose sum is σ = 665233134. Its totient is φ = 665233132.

The previous prime is 665233099. The next prime is 665233139. The reversal of 665233133 is 331332566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 589421284 + 75811849 = 24278^2 + 8707^2 .

It is a cyclic number.

It is not a de Polignac number, because 665233133 - 2²⁰ = 664184557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665233133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665233139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332616566 + 332616567.

It is an arithmetic number, because the mean of its divisors is an integer number (332616567).

Almost surely, 2^665233133 is an apocalyptic number.

It is an amenable number.

665233133 is a deficient number, since it is larger than the sum of its proper divisors (1).

665233133 is an equidigital number, since it uses as much as digits as its factorization.

665233133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 32.

The square root of 665233133 is about 25792.1137753384. The cubic root of 665233133 is about 872.9538618899.

Adding to 665233133 its reverse (331332566), we get a palindrome (996565699).

The spelling of 665233133 in words is "six hundred sixty-five million, two hundred thirty-three thousand, one hundred thirty-three".