668204033 has 12 divisors (see below), whose sum is σ = 786668400. Its totient is φ = 565842312.

The previous prime is 668203927. The next prime is 668204063. The reversal of 668204033 is 330402866.

It is a de Polignac number, because none of the positive numbers 2^k-668204033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (668204063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78083 + ... + 86216.

It is an arithmetic number, because the mean of its divisors is an integer number (65555700).

Almost surely, 2^668204033 is an apocalyptic number.

It is an amenable number.

668204033 is a deficient number, since it is larger than the sum of its proper divisors (118464367).

668204033 is a wasteful number, since it uses less digits than its factorization.

668204033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164396 (or 164389 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 668204033 is about 25849.6428021743. The cubic root of 668204033 is about 874.2514558187.

Adding to 668204033 its reverse (330402866), we get a palindrome (998606899).

The spelling of 668204033 in words is "six hundred sixty-eight million, two hundred four thousand, thirty-three".