6671141543861 has 2 divisors, whose sum is σ = 6671141543862. Its totient is φ = 6671141543860.

The previous prime is 6671141543839. The next prime is 6671141543867. The reversal of 6671141543861 is 1683451411766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3995401322500 + 2675740221361 = 1998850^2 + 1635769^2 .

It is a cyclic number.

It is not a de Polignac number, because 6671141543861 - 2³⁴ = 6653961674677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6671141543867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335570771930 + 3335570771931.

It is an arithmetic number, because the mean of its divisors is an integer number (3335570771931).

Almost surely, 2^{6671141543861} is an apocalyptic number.

It is an amenable number.

6671141543861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6671141543861 is an equidigital number, since it uses as much as digits as its factorization.

6671141543861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 53.

The spelling of 6671141543861 in words is "six trillion, six hundred seventy-one billion, one hundred forty-one million, five hundred forty-three thousand, eight hundred sixty-one".