671344474681 has 8 divisors (see below), whose sum is σ = 675132381000. Its totient is φ = 667560407808.

The previous prime is 671344474637. The next prime is 671344474709. The reversal of 671344474681 is 186474443176.

It can be written as a sum of positive squares in 4 ways, for example, as 344293165225 + 327051309456 = 586765^2 + 571884^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671344474681 - 2¹⁵ = 671344441913 is a prime.

It is a super-2 number, since 2×671344474681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671344474081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608806 + ... + 1308943.

It is an arithmetic number, because the mean of its divisors is an integer number (84391547625).

Almost surely, 2^671344474681 is an apocalyptic number.

It is an amenable number.

671344474681 is a deficient number, since it is larger than the sum of its proper divisors (3787906319).

671344474681 is a wasteful number, since it uses less digits than its factorization.

671344474681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919723.

The product of its digits is 10838016, while the sum is 55.

The spelling of 671344474681 in words is "six hundred seventy-one billion, three hundred forty-four million, four hundred seventy-four thousand, six hundred eighty-one".