1668516685335 has 24 divisors (see below), whose sum is σ = 2991823024320. Its totient is φ = 859190200512.

The previous prime is 1668516685247. The next prime is 1668516685357. The reversal of 1668516685335 is 5335866158661.

It is a happy number.

1668516685335 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 516 + 6 + 85 + 3 + 35 = 666.

It is not a de Polignac number, because 1668516685335 - 2¹⁰ = 1668516684311 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 639277119 + ... + 639279728.

It is an arithmetic number, because the mean of its divisors is an integer number (124659292680).

Almost surely, 2^{1668516685335} is an apocalyptic number.

1668516685335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1668516685335 is a deficient number, since it is larger than the sum of its proper divisors (1323306338985).

1668516685335 is a wasteful number, since it uses less digits than its factorization.

1668516685335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278556887 (or 1278556884 counting only the distinct ones).

The product of its digits is 93312000, while the sum is 63.

The spelling of 1668516685335 in words is "one trillion, six hundred sixty-eight billion, five hundred sixteen million, six hundred eighty-five thousand, three hundred thirty-five".