670609811 has 4 divisors (see below), whose sum is σ = 686205432. Its totient is φ = 655014192.

The previous prime is 670609799. The next prime is 670609843. The reversal of 670609811 is 118906076.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670609811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670609211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7797746 + ... + 7797831.

It is an arithmetic number, because the mean of its divisors is an integer number (171551358).

Almost surely, 2^670609811 is an apocalyptic number.

670609811 is a deficient number, since it is larger than the sum of its proper divisors (15595621).

670609811 is a wasteful number, since it uses less digits than its factorization.

670609811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15595620.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 670609811 is about 25896.1350591164. The cubic root of 670609811 is about 875.2994070884.

The spelling of 670609811 in words is "six hundred seventy million, six hundred nine thousand, eight hundred eleven".