1668283605504 has 120 divisors (see below), whose sum is σ = 4819207144752. Its totient is φ = 555583150080.

The previous prime is 1668283605451. The next prime is 1668283605509. The reversal of 1668283605504 is 4055063828661.

1668283605504 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 2 + 83 + 6 + 0 + 550 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (1668283605509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4861407 + ... + 5193249.

Almost surely, 2^{1668283605504} 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 1668283605504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2409603572376).

1668283605504 is an abundant number, since it is smaller than the sum of its proper divisors (3150923539248).

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

1668283605504 is a wasteful number, since it uses less digits than its factorization.

1668283605504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332958 (or 332939 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 1668283605504 in words is "one trillion, six hundred sixty-eight billion, two hundred eighty-three million, six hundred five thousand, five hundred four".