676643238647 has 2 divisors, whose sum is σ = 676643238648. Its totient is φ = 676643238646.

The previous prime is 676643238641. The next prime is 676643238683. The reversal of 676643238647 is 746832346676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 676643238647 - 2¹² = 676643234551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 676643238647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676643238641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338321619323 + 338321619324.

It is an arithmetic number, because the mean of its divisors is an integer number (338321619324).

Almost surely, 2^676643238647 is an apocalyptic number.

676643238647 is a deficient number, since it is larger than the sum of its proper divisors (1).

676643238647 is an equidigital number, since it uses as much as digits as its factorization.

676643238647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 146313216, while the sum is 62.

The spelling of 676643238647 in words is "six hundred seventy-six billion, six hundred forty-three million, two hundred thirty-eight thousand, six hundred forty-seven".