671466409 has 8 divisors (see below), whose sum is σ = 679982688. Its totient is φ = 662991840.

The previous prime is 671466407. The next prime is 671466413. The reversal of 671466409 is 904664176.

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 671466409 - 2¹ = 671466407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671466401) 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, 22629 + ... + 43069.

It is an arithmetic number, because the mean of its divisors is an integer number (84997836).

Almost surely, 2^671466409 is an apocalyptic number.

It is an amenable number.

671466409 is a deficient number, since it is larger than the sum of its proper divisors (8516279).

671466409 is a wasteful number, since it uses less digits than its factorization.

671466409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20855.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 671466409 is about 25912.6688899465. The cubic root of 671466409 is about 875.6719340501.

The spelling of 671466409 in words is "six hundred seventy-one million, four hundred sixty-six thousand, four hundred nine".