671465221 has 8 divisors (see below), whose sum is σ = 768657920. Its totient is φ = 574589808.

The previous prime is 671465219. The next prime is 671465257. The reversal of 671465221 is 122564176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671465221 - 2¹ = 671465219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671465261) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 74766 + ... + 83263.

It is an arithmetic number, because the mean of its divisors is an integer number (96082240).

Almost surely, 2^671465221 is an apocalyptic number.

It is an amenable number.

671465221 is a deficient number, since it is larger than the sum of its proper divisors (97192699).

671465221 is a wasteful number, since it uses less digits than its factorization.

671465221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158643.

The product of its digits is 20160, while the sum is 34.

The square root of 671465221 is about 25912.6459667862. The cubic root of 671465221 is about 875.6714176188.

The spelling of 671465221 in words is "six hundred seventy-one million, four hundred sixty-five thousand, two hundred twenty-one".