671111112 has 64 divisors (see below), whose sum is σ = 2000839680. Its totient is φ = 183408192.

The previous prime is 671111107. The next prime is 671111113. The reversal of 671111112 is 211111176.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (671111113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82978 + ... + 90705.

It is an arithmetic number, because the mean of its divisors is an integer number (31263120).

Almost surely, 2^671111112 is an apocalyptic number.

It is an amenable number.

671111112 is an abundant number, since it is smaller than the sum of its proper divisors (1329728568).

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

671111112 is a wasteful number, since it uses less digits than its factorization.

671111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173722 (or 173718 counting only the distinct ones).

The product of its digits is 84, while the sum is 21.

The square root of 671111112 is about 25905.8123207901. The cubic root of 671111112 is about 875.5174569739.

Adding to 671111112 its reverse (211111176), we get a palindrome (882222288).

The spelling of 671111112 in words is "six hundred seventy-one million, one hundred eleven thousand, one hundred twelve".