1998665370239 has 8 divisors (see below), whose sum is σ = 2038850415072. Its totient is φ = 1958571969120.

The previous prime is 1998665370181. The next prime is 1998665370259. The reversal of 1998665370239 is 9320735668991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1998665370239 - 2¹⁶ = 1998665304703 is a prime.

It is a super-3 number, since 3×1998665370239³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998665370259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22866872 + ... + 22954109.

It is an arithmetic number, because the mean of its divisors is an integer number (254856301884).

Almost surely, 2^{1998665370239} is an apocalyptic number.

1998665370239 is a deficient number, since it is larger than the sum of its proper divisors (40185044833).

1998665370239 is an equidigital number, since it uses as much as digits as its factorization.

1998665370239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45821857.

The product of its (nonzero) digits is 132269760, while the sum is 68.

The spelling of 1998665370239 in words is "one trillion, nine hundred ninety-eight billion, six hundred sixty-five million, three hundred seventy thousand, two hundred thirty-nine".