671096681 has 4 divisors (see below), whose sum is σ = 675115392. Its totient is φ = 667077972.

The previous prime is 671096669. The next prime is 671096687. The reversal of 671096681 is 186690176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671096681 - 2¹⁴ = 671080297 is a prime.

It is a super-2 number, since 2×671096681² = 900741510498431522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671096687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2009105 + ... + 2009438.

It is an arithmetic number, because the mean of its divisors is an integer number (168778848).

Almost surely, 2^671096681 is an apocalyptic number.

It is an amenable number.

671096681 is a deficient number, since it is larger than the sum of its proper divisors (4018711).

671096681 is a wasteful number, since it uses less digits than its factorization.

671096681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4018710.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 671096681 is about 25905.5337910648. The cubic root of 671096681 is about 875.5111814691.

The spelling of 671096681 in words is "six hundred seventy-one million, ninety-six thousand, six hundred eighty-one".