671208685 has 8 divisors (see below), whose sum is σ = 920514816. Its totient is φ = 460257360.

The previous prime is 671208679. The next prime is 671208691. The reversal of 671208685 is 586802176.

It is an interprime number because it is at equal distance from previous prime (671208679) and next prime (671208691).

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

It is not a de Polignac number, because 671208685 - 2¹⁷ = 671077613 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 9588661 + ... + 9588730.

It is an arithmetic number, because the mean of its divisors is an integer number (115064352).

Almost surely, 2^671208685 is an apocalyptic number.

It is an amenable number.

671208685 is a deficient number, since it is larger than the sum of its proper divisors (249306131).

671208685 is a wasteful number, since it uses less digits than its factorization.

671208685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19177403.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 671208685 is about 25907.6954783709. The cubic root of 671208685 is about 875.5598854797.

It can be divided in two parts, 6712086 and 85, that multiplied together give a triangular number (570527310 = T₃₃₇₇₉).

The spelling of 671208685 in words is "six hundred seventy-one million, two hundred eight thousand, six hundred eighty-five".