1668516668514 has 12 divisors (see below), whose sum is σ = 3615119448486. Its totient is φ = 556172222832.

The previous prime is 1668516668501. The next prime is 1668516668519. The reversal of 1668516668514 is 4158666158661.

It can be written as a sum of positive squares in only one way, i.e., 1593312930225 + 75203738289 = 1262265^2 + 274233^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1668516668519) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46347685219 + ... + 46347685254.

Almost surely, 2^{1668516668514} is an apocalyptic number.

1668516668514 is an abundant number, since it is smaller than the sum of its proper divisors (1946602779972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668516668514 is a wasteful number, since it uses less digits than its factorization.

1668516668514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92695370481 (or 92695370478 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 1668516668514 in words is "one trillion, six hundred sixty-eight billion, five hundred sixteen million, six hundred sixty-eight thousand, five hundred fourteen".