668056205443 has 4 divisors (see below), whose sum is σ = 728788587768. Its totient is φ = 607323823120.

The previous prime is 668056205429. The next prime is 668056205459. The reversal of 668056205443 is 344502650866.

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 668056205443 - 2⁹ = 668056204931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668056205483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30366191146 + ... + 30366191167.

It is an arithmetic number, because the mean of its divisors is an integer number (182197146942).

Almost surely, 2^668056205443 is an apocalyptic number.

668056205443 is a deficient number, since it is larger than the sum of its proper divisors (60732382325).

668056205443 is a wasteful number, since it uses less digits than its factorization.

668056205443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60732382324.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 668056205443 in words is "six hundred sixty-eight billion, fifty-six million, two hundred five thousand, four hundred forty-three".