671221672 has 32 divisors (see below), whose sum is σ = 1417248000. Its totient is φ = 295257600.

The previous prime is 671221669. The next prime is 671221697. The reversal of 671221672 is 276122176.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120297 + ... + 125752.

It is an arithmetic number, because the mean of its divisors is an integer number (44289000).

Almost surely, 2^671221672 is an apocalyptic number.

671221672 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

671221672 is an abundant number, since it is smaller than the sum of its proper divisors (746026328).

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

671221672 is a wasteful number, since it uses less digits than its factorization.

671221672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246097 (or 246093 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 671221672 is about 25907.9461169735. The cubic root of 671221672 is about 875.5655324184.

The spelling of 671221672 in words is "six hundred seventy-one million, two hundred twenty-one thousand, six hundred seventy-two".