670686823 has 4 divisors (see below), whose sum is σ = 678222720. Its totient is φ = 663150928.

The previous prime is 670686811. The next prime is 670686847. The reversal of 670686823 is 328686076.

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

It is a cyclic number.

It is not a de Polignac number, because 670686823 - 2⁵ = 670686791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670686623) 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, 3767815 + ... + 3767992.

It is an arithmetic number, because the mean of its divisors is an integer number (169555680).

Almost surely, 2^670686823 is an apocalyptic number.

670686823 is a deficient number, since it is larger than the sum of its proper divisors (7535897).

670686823 is an equidigital number, since it uses as much as digits as its factorization.

670686823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7535896.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 670686823 is about 25897.6219564654. The cubic root of 670686823 is about 875.3329119057.

The spelling of 670686823 in words is "six hundred seventy million, six hundred eighty-six thousand, eight hundred twenty-three".