671466809 has 8 divisors (see below), whose sum is σ = 733303872. Its totient is φ = 611084880.

The previous prime is 671466773. The next prime is 671466827. The reversal of 671466809 is 908664176.

It is a happy number.

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 671466809 - 2¹⁶ = 671401273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (671466869) 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, 362819 + ... + 364664.

It is an arithmetic number, because the mean of its divisors is an integer number (91662984).

Almost surely, 2^671466809 is an apocalyptic number.

It is an amenable number.

671466809 is a deficient number, since it is larger than the sum of its proper divisors (61837063).

671466809 is a wasteful number, since it uses less digits than its factorization.

671466809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727567.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 671466809 is about 25912.6766081777. The cubic root of 671466809 is about 875.6721079325.

The spelling of 671466809 in words is "six hundred seventy-one million, four hundred sixty-six thousand, eight hundred nine".