670205 has 8 divisors (see below), whose sum is σ = 808704. Its totient is φ = 533200.

The previous prime is 670199. The next prime is 670211. The reversal of 670205 is 502076.

It is an interprime number because it is at equal distance from previous prime (670199) and next prime (670211).

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

It is not a de Polignac number, because 670205 - 2¹⁰ = 669181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670205.

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, 1340 + ... + 1770.

It is an arithmetic number, because the mean of its divisors is an integer number (101088).

2⁶⁷⁰²⁰⁵ is an apocalyptic number.

It is an amenable number.

670205 is a deficient number, since it is larger than the sum of its proper divisors (138499).

670205 is a wasteful number, since it uses less digits than its factorization.

670205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 670205 is about 818.6604912905. The cubic root of 670205 is about 87.5123247945.

The spelling of 670205 in words is "six hundred seventy thousand, two hundred five".