671323266 has 12 divisors (see below), whose sum is σ = 1454533782. Its totient is φ = 223774416.

The previous prime is 671323253. The next prime is 671323271. The reversal of 671323266 is 662323176.

671323266 is a `hidden beast` number, since 6 + 71 + 323 + 266 = 666.

It can be written as a sum of positive squares in only one way, i.e., 663320025 + 8003241 = 25755^2 + 2829^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 671323266.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18647851 + ... + 18647886.

Almost surely, 2^671323266 is an apocalyptic number.

671323266 is an abundant number, since it is smaller than the sum of its proper divisors (783210516).

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

671323266 is a wasteful number, since it uses less digits than its factorization.

671323266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37295745 (or 37295742 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 671323266 is about 25909.9067153859. The cubic root of 671323266 is about 875.6097044711.

The spelling of 671323266 in words is "six hundred seventy-one million, three hundred twenty-three thousand, two hundred sixty-six".