670705 has 8 divisors (see below), whose sum is σ = 919872. Its totient is φ = 459888.

The previous prime is 670693. The next prime is 670711. The reversal of 670705 is 507076.

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

It is a cyclic number.

It is not a de Polignac number, because 670705 - 2⁵ = 670673 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 670705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9547 + ... + 9616.

It is an arithmetic number, because the mean of its divisors is an integer number (114984).

2⁶⁷⁰⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

670705 is a deficient number, since it is larger than the sum of its proper divisors (249167).

670705 is a wasteful number, since it uses less digits than its factorization.

670705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19175.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 670705 is about 818.9658112522. The cubic root of 670705 is about 87.5340819612.

The spelling of 670705 in words is "six hundred seventy thousand, seven hundred five".