671716 has 12 divisors (see below), whose sum is σ = 1181488. Its totient is φ = 334152.

The previous prime is 671701. The next prime is 671717. The reversal of 671716 is 617176.

It is a hoax number, since the sum of its digits (28) 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 (671717) 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, 955 + ... + 1501.

2⁶⁷¹⁷¹⁶ is an apocalyptic number.

It is an amenable number.

671716 is a deficient number, since it is larger than the sum of its proper divisors (509772).

671716 is a wasteful number, since it uses less digits than its factorization.

671716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 856 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 671716 is about 819.5828207082. The cubic root of 671716 is about 87.5780419377.

The spelling of 671716 in words is "six hundred seventy-one thousand, seven hundred sixteen".