1660491540239 has 8 divisors (see below), whose sum is σ = 1917268583328. Its totient is φ = 1408605488640.

The previous prime is 1660491540181. The next prime is 1660491540263. The reversal of 1660491540239 is 9320451940661.

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

It is not a de Polignac number, because 1660491540239 - 2⁴⁰ = 560979912463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660491545239) 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 7 ways as a sum of consecutive naturals, for example, 1222747142 + ... + 1222748499.

It is an arithmetic number, because the mean of its divisors is an integer number (239658572916).

Almost surely, 2^{1660491540239} is an apocalyptic number.

1660491540239 is a deficient number, since it is larger than the sum of its proper divisors (256777043089).

1660491540239 is an equidigital number, since it uses as much as digits as its factorization.

1660491540239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445495745.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 1660491540239 in words is "one trillion, six hundred sixty billion, four hundred ninety-one million, five hundred forty thousand, two hundred thirty-nine".