671166023641 has 2 divisors, whose sum is σ = 671166023642. Its totient is φ = 671166023640.

The previous prime is 671166023597. The next prime is 671166023699. The reversal of 671166023641 is 146320661176.

671166023641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492719763600 + 178446260041 = 701940^2 + 422429^2 .

It is a cyclic number.

It is not a de Polignac number, because 671166023641 - 2¹⁹ = 671165499353 is a prime.

It is not a weakly prime, because it can be changed into another prime (671166027641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335583011820 + 335583011821.

It is an arithmetic number, because the mean of its divisors is an integer number (335583011821).

Almost surely, 2^671166023641 is an apocalyptic number.

It is an amenable number.

671166023641 is a deficient number, since it is larger than the sum of its proper divisors (1).

671166023641 is an equidigital number, since it uses as much as digits as its factorization.

671166023641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 671166023641 in words is "six hundred seventy-one billion, one hundred sixty-six million, twenty-three thousand, six hundred forty-one".