671206214645717 has 2 divisors, whose sum is σ = 671206214645718. Its totient is φ = 671206214645716.

The previous prime is 671206214645647. The next prime is 671206214645723. The reversal of 671206214645717 is 717546412602176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570130517288836 + 101075697356881 = 23877406^2 + 10053641^2 .

It is a cyclic number.

It is not a de Polignac number, because 671206214645717 - 2³² = 671201919678421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671206214645017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335603107322858 + 335603107322859.

It is an arithmetic number, because the mean of its divisors is an integer number (335603107322859).

Almost surely, 2^{671206214645717} is an apocalyptic number.

It is an amenable number.

671206214645717 is a deficient number, since it is larger than the sum of its proper divisors (1).

671206214645717 is an equidigital number, since it uses as much as digits as its factorization.

671206214645717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 671206214645717 in words is "six hundred seventy-one trillion, two hundred six billion, two hundred fourteen million, six hundred forty-five thousand, seven hundred seventeen".