671742245327 has 2 divisors, whose sum is σ = 671742245328. Its totient is φ = 671742245326.

The previous prime is 671742245281. The next prime is 671742245351. The reversal of 671742245327 is 723542247176.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671742245327 - 2²⁶ = 671675136463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671742245527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335871122663 + 335871122664.

It is an arithmetic number, because the mean of its divisors is an integer number (335871122664).

Almost surely, 2^671742245327 is an apocalyptic number.

671742245327 is a deficient number, since it is larger than the sum of its proper divisors (1).

671742245327 is an equidigital number, since it uses as much as digits as its factorization.

671742245327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3951360, while the sum is 50.

The spelling of 671742245327 in words is "six hundred seventy-one billion, seven hundred forty-two million, two hundred forty-five thousand, three hundred twenty-seven".