671267568577 has 2 divisors, whose sum is σ = 671267568578. Its totient is φ = 671267568576.

The previous prime is 671267568563. The next prime is 671267568599. The reversal of 671267568577 is 775865762176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634660782336 + 36606786241 = 796656^2 + 191329^2 .

It is a cyclic number.

It is not a de Polignac number, because 671267568577 - 2¹⁹ = 671267044289 is a prime.

It is not a weakly prime, because it can be changed into another prime (671267568977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335633784288 + 335633784289.

It is an arithmetic number, because the mean of its divisors is an integer number (335633784289).

Almost surely, 2^671267568577 is an apocalyptic number.

It is an amenable number.

671267568577 is a deficient number, since it is larger than the sum of its proper divisors (1).

671267568577 is an equidigital number, since it uses as much as digits as its factorization.

671267568577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207446400, while the sum is 67.

The spelling of 671267568577 in words is "six hundred seventy-one billion, two hundred sixty-seven million, five hundred sixty-eight thousand, five hundred seventy-seven".