1668353688504 has 32 divisors (see below), whose sum is σ = 4634315802000. Its totient is φ = 556117896096.

The previous prime is 1668353688503. The next prime is 1668353688553. The reversal of 1668353688504 is 4058863538661.

1668353688504 is a `hidden beast` number, since 1 + 6 + 68 + 3 + 5 + 3 + 68 + 8 + 504 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668353688503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3861929619 + ... + 3861930050.

Almost surely, 2^{1668353688504} is an apocalyptic number.

It is an amenable number.

1668353688504 is an abundant number, since it is smaller than the sum of its proper divisors (2965962113496).

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

1668353688504 is a wasteful number, since it uses less digits than its factorization.

1668353688504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7723859684 (or 7723859674 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 63.

The spelling of 1668353688504 in words is "one trillion, six hundred sixty-eight billion, three hundred fifty-three million, six hundred eighty-eight thousand, five hundred four".