671216886 has 12 divisors (see below), whose sum is σ = 1454303292. Its totient is φ = 223738956.

The previous prime is 671216837. The next prime is 671216891. The reversal of 671216886 is 688612176.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18644896 + ... + 18644931.

It is an arithmetic number, because the mean of its divisors is an integer number (121191941).

Almost surely, 2^671216886 is an apocalyptic number.

671216886 is an abundant number, since it is smaller than the sum of its proper divisors (783086406).

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

671216886 is a wasteful number, since it uses less digits than its factorization.

671216886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37289835 (or 37289832 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 671216886 is about 25907.8537513241. The cubic root of 671216886 is about 875.5634514036.

The spelling of 671216886 in words is "six hundred seventy-one million, two hundred sixteen thousand, eight hundred eighty-six".