670304881 has 4 divisors (see below), whose sum is σ = 670515700. Its totient is φ = 670094064.

The previous prime is 670304879. The next prime is 670304891. The reversal of 670304881 is 188403076.

It is a happy number.

670304881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122323600 + 547981281 = 11060^2 + 23409^2 .

It is a cyclic number.

It is not a de Polignac number, because 670304881 - 2¹ = 670304879 is a prime.

It is a super-2 number, since 2×670304881² = 898617266984848322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 670304881.

It is not an unprimeable number, because it can be changed into a prime (670304851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100566 + ... + 107023.

It is an arithmetic number, because the mean of its divisors is an integer number (167628925).

Almost surely, 2^670304881 is an apocalyptic number.

It is an amenable number.

670304881 is a deficient number, since it is larger than the sum of its proper divisors (210819).

670304881 is a wasteful number, since it uses less digits than its factorization.

670304881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210818.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 670304881 is about 25890.2468315773. The cubic root of 670304881 is about 875.1667191435.

The spelling of 670304881 in words is "six hundred seventy million, three hundred four thousand, eight hundred eighty-one".