1668895372893 has 32 divisors (see below), whose sum is σ = 2551527972864. Its totient is φ = 950488019712.

The previous prime is 1668895372871. The next prime is 1668895372897. The reversal of 1668895372893 is 3982735988661.

It is not a de Polignac number, because 1668895372893 - 2¹⁷ = 1668895241821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668895372897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20674096 + ... + 20754662.

It is an arithmetic number, because the mean of its divisors is an integer number (79735249152).

Almost surely, 2^{1668895372893} is an apocalyptic number.

It is an amenable number.

1668895372893 is a deficient number, since it is larger than the sum of its proper divisors (882632599971).

1668895372893 is a wasteful number, since it uses less digits than its factorization.

1668895372893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83841.

The product of its digits is 940584960, while the sum is 75.

The spelling of 1668895372893 in words is "one trillion, six hundred sixty-eight billion, eight hundred ninety-five million, three hundred seventy-two thousand, eight hundred ninety-three".