668315210443 has 4 divisors (see below), whose sum is σ = 668316852000. Its totient is φ = 668313568888.

The previous prime is 668315210419. The next prime is 668315210447. The reversal of 668315210443 is 344012513866.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 668315210443 - 2⁹ = 668315209931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668315210443.

It is not an unprimeable number, because it can be changed into a prime (668315210447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300558 + ... + 1194556.

It is an arithmetic number, because the mean of its divisors is an integer number (167079213000).

Almost surely, 2^668315210443 is an apocalyptic number.

668315210443 is a deficient number, since it is larger than the sum of its proper divisors (1641557).

668315210443 is an equidigital number, since it uses as much as digits as its factorization.

668315210443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641556.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 668315210443 in words is "six hundred sixty-eight billion, three hundred fifteen million, two hundred ten thousand, four hundred forty-three".