1668518686848 has 512 divisors, whose sum is σ = 5193585734400. Its totient is φ = 470184099840.

The previous prime is 1668518686843. The next prime is 1668518686903. The reversal of 1668518686848 is 8486868158661.

It is a self number, because there is not a number n which added to its sum of digits gives 1668518686848.

It is not an unprimeable number, because it can be changed into a prime (1668518686843) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 439428886 + ... + 439432682.

Almost surely, 2^{1668518686848} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668518686848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2596792867200).

1668518686848 is an abundant number, since it is smaller than the sum of its proper divisors (3525067047552).

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

1668518686848 is a wasteful number, since it uses less digits than its factorization.

1668518686848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000 (or 3988 counting only the distinct ones).

The product of its digits is 849346560, while the sum is 75.

The spelling of 1668518686848 in words is "one trillion, six hundred sixty-eight billion, five hundred eighteen million, six hundred eighty-six thousand, eight hundred forty-eight".