1666835018513 has 8 divisors (see below), whose sum is σ = 1904985789120. Its totient is φ = 1428692118480.

The previous prime is 1666835018477. The next prime is 1666835018551. The reversal of 1666835018513 is 3158105386661.

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 1666835018513 - 2³⁰ = 1665761276689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666835018573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1506623 + ... + 2367188.

It is an arithmetic number, because the mean of its divisors is an integer number (238123223640).

Almost surely, 2^{1666835018513} is an apocalyptic number.

It is an amenable number.

1666835018513 is a deficient number, since it is larger than the sum of its proper divisors (238150770607).

1666835018513 is an equidigital number, since it uses as much as digits as its factorization.

1666835018513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935287.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 1666835018513 in words is "one trillion, six hundred sixty-six billion, eight hundred thirty-five million, eighteen thousand, five hundred thirteen".