671111646 has 8 divisors (see below), whose sum is σ = 1342223304. Its totient is φ = 223703880.

The previous prime is 671111627. The next prime is 671111647. The reversal of 671111646 is 646111176.

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

671111646 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671111647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55925965 + ... + 55925976.

It is an arithmetic number, because the mean of its divisors is an integer number (167777913).

Almost surely, 2^671111646 is an apocalyptic number.

671111646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671111646 is a wasteful number, since it uses less digits than its factorization.

671111646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111851946.

The product of its digits is 6048, while the sum is 33.

The square root of 671111646 is about 25905.8226273554. The cubic root of 671111646 is about 875.5176891889.

The spelling of 671111646 in words is "six hundred seventy-one million, one hundred eleven thousand, six hundred forty-six".