680656350347 has 2 divisors, whose sum is σ = 680656350348. Its totient is φ = 680656350346.

The previous prime is 680656350293. The next prime is 680656350371. The reversal of 680656350347 is 743053656086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680656350347 - 2⁸ = 680656350091 is a prime.

It is not a weakly prime, because it can be changed into another prime (680656350377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340328175173 + 340328175174.

It is an arithmetic number, because the mean of its divisors is an integer number (340328175174).

Almost surely, 2^680656350347 is an apocalyptic number.

680656350347 is a deficient number, since it is larger than the sum of its proper divisors (1).

680656350347 is an equidigital number, since it uses as much as digits as its factorization.

680656350347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 680656350347 in words is "six hundred eighty billion, six hundred fifty-six million, three hundred fifty thousand, three hundred forty-seven".