670685 has 8 divisors (see below), whose sum is σ = 830976. Its totient is φ = 519120.

The previous prime is 670673. The next prime is 670693. The reversal of 670685 is 586076.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 670685 - 2⁴ = 670669 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009 + ... + 2318.

It is an arithmetic number, because the mean of its divisors is an integer number (103872).

2⁶⁷⁰⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

670685 is a deficient number, since it is larger than the sum of its proper divisors (160291).

670685 is a wasteful number, since it uses less digits than its factorization.

670685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 670685 is about 818.9536006393. The cubic root of 670685 is about 87.5332118822.

The spelling of 670685 in words is "six hundred seventy thousand, six hundred eighty-five".