1668351944187 has 6 divisors (see below), whose sum is σ = 2409841697172. Its totient is φ = 1112234629452.

The previous prime is 1668351944177. The next prime is 1668351944191. The reversal of 1668351944187 is 7814491538661.

1668351944187 is a `hidden beast` number, since 1 + 6 + 6 + 83 + 51 + 94 + 418 + 7 = 666.

It is not a de Polignac number, because 1668351944187 - 2⁷ = 1668351944059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668351944137) 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, 92686219113 + ... + 92686219130.

It is an arithmetic number, because the mean of its divisors is an integer number (401640282862).

Almost surely, 2^{1668351944187} is an apocalyptic number.

1668351944187 is a deficient number, since it is larger than the sum of its proper divisors (741489752985).

1668351944187 is a wasteful number, since it uses less digits than its factorization.

1668351944187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185372438249 (or 185372438246 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 1668351944187 in words is "one trillion, six hundred sixty-eight billion, three hundred fifty-one million, nine hundred forty-four thousand, one hundred eighty-seven".