671722712 has 16 divisors (see below), whose sum is σ = 1260714840. Its totient is φ = 335532096.

The previous prime is 671722703. The next prime is 671722757. The reversal of 671722712 is 217227176.

It is a super-2 number, since 2×671722712² = 902422803633269888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32378 + ... + 48905.

Almost surely, 2^671722712 is an apocalyptic number.

It is an amenable number.

671722712 is a deficient number, since it is larger than the sum of its proper divisors (588992128).

671722712 is a wasteful number, since it uses less digits than its factorization.

671722712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82322 (or 82318 counting only the distinct ones).

The product of its digits is 16464, while the sum is 35.

The square root of 671722712 is about 25917.6139333851. The cubic root of 671722712 is about 875.7833363930.

Adding to 671722712 its reverse (217227176), we get a palindrome (888949888).

The spelling of 671722712 in words is "six hundred seventy-one million, seven hundred twenty-two thousand, seven hundred twelve".