1668516668518 has 12 divisors (see below), whose sum is σ = 2911391329932. Its totient is φ = 715078572180.

The previous prime is 1668516668501. The next prime is 1668516668519. The reversal of 1668516668518 is 8158666158661.

It is a congruent number.

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, 8512840048 + ... + 8512840243.

It is an arithmetic number, because the mean of its divisors is an integer number (242615944161).

Almost surely, 2^{1668516668518} is an apocalyptic number.

1668516668518 is a deficient number, since it is larger than the sum of its proper divisors (1242874661414).

1668516668518 is a wasteful number, since it uses less digits than its factorization.

1668516668518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17025680307 (or 17025680300 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 67.

The spelling of 1668516668518 in words is "one trillion, six hundred sixty-eight billion, five hundred sixteen million, six hundred sixty-eight thousand, five hundred eighteen".