671340005 has 8 divisors (see below), whose sum is σ = 920694912. Its totient is φ = 460347408.

The previous prime is 671340001. The next prime is 671340011. The reversal of 671340005 is 500043176.

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 671340005 - 2² = 671340001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671340001) 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, 9590537 + ... + 9590606.

It is an arithmetic number, because the mean of its divisors is an integer number (115086864).

Almost surely, 2^671340005 is an apocalyptic number.

It is an amenable number.

671340005 is a deficient number, since it is larger than the sum of its proper divisors (249354907).

671340005 is a wasteful number, since it uses less digits than its factorization.

671340005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19181155.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 671340005 is about 25910.2297365346. The cubic root of 671340005 is about 875.6169819929.

The spelling of 671340005 in words is "six hundred seventy-one million, three hundred forty thousand, five".