671740220 has 12 divisors (see below), whose sum is σ = 1410654504. Its totient is φ = 268696080.

The previous prime is 671740207. The next prime is 671740241. The reversal of 671740220 is 22047176.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16793486 + ... + 16793525.

It is an arithmetic number, because the mean of its divisors is an integer number (117554542).

Almost surely, 2^671740220 is an apocalyptic number.

It is an amenable number.

671740220 is an abundant number, since it is smaller than the sum of its proper divisors (738914284).

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

671740220 is a wasteful number, since it uses less digits than its factorization.

671740220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33587020 (or 33587018 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 671740220 is about 25917.9516937585. The cubic root of 671740220 is about 875.7909452278.

Adding to 671740220 its reverse (22047176), we get a palindrome (693787396).

The spelling of 671740220 in words is "six hundred seventy-one million, seven hundred forty thousand, two hundred twenty".