1668729014243 has 4 divisors (see below), whose sum is σ = 1668732154320. Its totient is φ = 1668725874168.

The previous prime is 1668729014219. The next prime is 1668729014257. The reversal of 1668729014243 is 3424109278661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1668729014243 - 2²² = 1668724819939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668729014443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553508 + ... + 1908881.

It is an arithmetic number, because the mean of its divisors is an integer number (417183038580).

Almost surely, 2^{1668729014243} is an apocalyptic number.

1668729014243 is a deficient number, since it is larger than the sum of its proper divisors (3140077).

1668729014243 is an equidigital number, since it uses as much as digits as its factorization.

1668729014243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140076.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 1668729014243 in words is "one trillion, six hundred sixty-eight billion, seven hundred twenty-nine million, fourteen thousand, two hundred forty-three".