668333133 has 32 divisors (see below), whose sum is σ = 1091108480. Its totient is φ = 401708160.

The previous prime is 668333131. The next prime is 668333191. The reversal of 668333133 is 331333866.

It is not a de Polignac number, because 668333133 - 2¹ = 668333131 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668333131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7048 + ... + 37233.

It is an arithmetic number, because the mean of its divisors is an integer number (34097140).

Almost surely, 2^668333133 is an apocalyptic number.

It is an amenable number.

668333133 is a deficient number, since it is larger than the sum of its proper divisors (422775347).

668333133 is a wasteful number, since it uses less digits than its factorization.

668333133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44346 (or 44340 counting only the distinct ones).

The product of its digits is 69984, while the sum is 36.

The square root of 668333133 is about 25852.1398147233. The cubic root of 668333133 is about 874.3077552869.

Adding to 668333133 its reverse (331333866), we get a palindrome (999666999).

The spelling of 668333133 in words is "six hundred sixty-eight million, three hundred thirty-three thousand, one hundred thirty-three".