671601771 has 24 divisors (see below), whose sum is σ = 1036971936. Its totient is φ = 417816960.

The previous prime is 671601731. The next prime is 671601803. The reversal of 671601771 is 177106176.

It is not a de Polignac number, because 671601771 - 2¹⁰ = 671600747 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (671601731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31080 + ... + 48053.

It is an arithmetic number, because the mean of its divisors is an integer number (43207164).

Almost surely, 2^671601771 is an apocalyptic number.

671601771 is a deficient number, since it is larger than the sum of its proper divisors (365370165).

671601771 is a wasteful number, since it uses less digits than its factorization.

671601771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79203 (or 79200 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 36.

The square root of 671601771 is about 25915.2806467536. The cubic root of 671601771 is about 875.7307728039.

The spelling of 671601771 in words is "six hundred seventy-one million, six hundred one thousand, seven hundred seventy-one".