667172177341 has 2 divisors, whose sum is σ = 667172177342. Its totient is φ = 667172177340.

The previous prime is 667172177339. The next prime is 667172177389. The reversal of 667172177341 is 143771271766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666133468900 + 1038708441 = 816170^2 + 32229^2 .

It is a cyclic number.

It is not a de Polignac number, because 667172177341 - 2¹ = 667172177339 is a prime.

Together with 667172177339, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667172177941) 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, 333586088670 + 333586088671.

It is an arithmetic number, because the mean of its divisors is an integer number (333586088671).

Almost surely, 2^667172177341 is an apocalyptic number.

It is an amenable number.

667172177341 is a deficient number, since it is larger than the sum of its proper divisors (1).

667172177341 is an equidigital number, since it uses as much as digits as its factorization.

667172177341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2074464, while the sum is 52.

The spelling of 667172177341 in words is "six hundred sixty-seven billion, one hundred seventy-two million, one hundred seventy-seven thousand, three hundred forty-one".