663660333 has 12 divisors (see below), whose sum is σ = 1095566368. Its totient is φ = 379234440.

The previous prime is 663660313. The next prime is 663660341. The reversal of 663660333 is 333066366.

It is not a de Polignac number, because 663660333 - 2⁸ = 663660077 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 (663660313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5267083 + ... + 5267208.

Almost surely, 2^663660333 is an apocalyptic number.

663660333 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

663660333 is a deficient number, since it is larger than the sum of its proper divisors (431906035).

663660333 is a wasteful number, since it uses less digits than its factorization.

663660333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10534304 (or 10534301 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 36.

The square root of 663660333 is about 25761.6057923414. The cubic root of 663660333 is about 872.2653487312.

The spelling of 663660333 in words is "six hundred sixty-three million, six hundred sixty thousand, three hundred thirty-three".