668534294347 has 2 divisors, whose sum is σ = 668534294348. Its totient is φ = 668534294346.

The previous prime is 668534294341. The next prime is 668534294429. The reversal of 668534294347 is 743492435866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668534294347 - 2¹⁵ = 668534261579 is a prime.

It is not a weakly prime, because it can be changed into another prime (668534294341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334267147173 + 334267147174.

It is an arithmetic number, because the mean of its divisors is an integer number (334267147174).

Almost surely, 2^668534294347 is an apocalyptic number.

668534294347 is a deficient number, since it is larger than the sum of its proper divisors (1).

668534294347 is an equidigital number, since it uses as much as digits as its factorization.

668534294347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 61.

The spelling of 668534294347 in words is "six hundred sixty-eight billion, five hundred thirty-four million, two hundred ninety-four thousand, three hundred forty-seven".