671344746577 has 2 divisors, whose sum is σ = 671344746578. Its totient is φ = 671344746576.

The previous prime is 671344746571. The next prime is 671344746587. The reversal of 671344746577 is 775647443176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665470903696 + 5873842881 = 815764^2 + 76641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671344746577 is a prime.

It is not a weakly prime, because it can be changed into another prime (671344746571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335672373288 + 335672373289.

It is an arithmetic number, because the mean of its divisors is an integer number (335672373289).

Almost surely, 2^671344746577 is an apocalyptic number.

It is an amenable number.

671344746577 is a deficient number, since it is larger than the sum of its proper divisors (1).

671344746577 is an equidigital number, since it uses as much as digits as its factorization.

671344746577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82978560, while the sum is 61.

The spelling of 671344746577 in words is "six hundred seventy-one billion, three hundred forty-four million, seven hundred forty-six thousand, five hundred seventy-seven".