671704161 has 8 divisors (see below), whose sum is σ = 916433760. Its totient is φ = 437388672.

The previous prime is 671704151. The next prime is 671704193. The reversal of 671704161 is 161407176.

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

It is not a de Polignac number, because 671704161 - 2⁵ = 671704129 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (671704141) 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, 2603376 + ... + 2603633.

It is an arithmetic number, because the mean of its divisors is an integer number (114554220).

Almost surely, 2^671704161 is an apocalyptic number.

It is an amenable number.

671704161 is a deficient number, since it is larger than the sum of its proper divisors (244729599).

671704161 is a wasteful number, since it uses less digits than its factorization.

671704161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207055.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 671704161 is about 25917.2560468889. The cubic root of 671704161 is about 875.7752741346.

The spelling of 671704161 in words is "six hundred seventy-one million, seven hundred four thousand, one hundred sixty-one".