1998665333 has 12 divisors (see below), whose sum is σ = 2426459232. Its totient is φ = 1612367040.

The previous prime is 1998665303. The next prime is 1998665353. The reversal of 1998665333 is 3335668991.

It is not a de Polignac number, because 1998665333 - 2²⁰ = 1997616757 is a prime.

It is a super-2 number, since 2×1998665333² = 7989326226672001778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998665303) 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, 491963 + ... + 496008.

It is an arithmetic number, because the mean of its divisors is an integer number (202204936).

Almost surely, 2^1998665333 is an apocalyptic number.

It is an amenable number.

1998665333 is a deficient number, since it is larger than the sum of its proper divisors (427793899).

1998665333 is an equidigital number, since it uses as much as digits as its factorization.

1998665333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988012 (or 987995 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 53.

The square root of 1998665333 is about 44706.4350289754. The cubic root of 1998665333 is about 1259.6407250209.

The spelling of 1998665333 in words is "one billion, nine hundred ninety-eight million, six hundred sixty-five thousand, three hundred thirty-three".