1668418350925 has 12 divisors (see below), whose sum is σ = 2069052800320. Its totient is φ = 1334596587120.

The previous prime is 1668418350901. The next prime is 1668418350947. The reversal of 1668418350925 is 5290538148661.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1668418350925 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1668418350925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3205527 + ... + 3689476.

Almost surely, 2^{1668418350925} is an apocalyptic number.

It is an amenable number.

1668418350925 is a deficient number, since it is larger than the sum of its proper divisors (400634449395).

1668418350925 is an equidigital number, since it uses as much as digits as its factorization.

1668418350925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904692 (or 6904687 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 1668418350925 in words is "one trillion, six hundred sixty-eight billion, four hundred eighteen million, three hundred fifty thousand, nine hundred twenty-five".