671804674 has 16 divisors (see below), whose sum is σ = 1067971608. Its totient is φ = 315850752.

The previous prime is 671804669. The next prime is 671804687. The reversal of 671804674 is 476408176.

It can be written as a sum of positive squares in 4 ways, for example, as 547326025 + 124478649 = 23395^2 + 11157^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 671804674.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30634 + ... + 47770.

Almost surely, 2^671804674 is an apocalyptic number.

671804674 is a deficient number, since it is larger than the sum of its proper divisors (396166934).

671804674 is a wasteful number, since it uses less digits than its factorization.

671804674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18309.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 671804674 is about 25919.1950878109. The cubic root of 671804674 is about 875.8189552742.

The spelling of 671804674 in words is "six hundred seventy-one million, eight hundred four thousand, six hundred seventy-four".