670165 has 4 divisors (see below), whose sum is σ = 804204. Its totient is φ = 536128.

The previous prime is 670147. The next prime is 670177. The reversal of 670165 is 561076.

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

It can be written as a sum of positive squares in 2 ways, for example, as 311364 + 358801 = 558^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 670165 - 2⁷ = 670037 is a prime.

It is a super-2 number, since 2×670165² = 898242254450, which contains 22 as substring.

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

It is a Duffinian 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 670165.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67012 + ... + 67021.

It is an arithmetic number, because the mean of its divisors is an integer number (201051).

2⁶⁷⁰¹⁶⁵ is an apocalyptic number.

It is an amenable number.

670165 is a deficient number, since it is larger than the sum of its proper divisors (134039).

670165 is a wasteful number, since it uses less digits than its factorization.

670165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134038.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 670165 is about 818.6360607743. The cubic root of 670165 is about 87.5105837538.

The spelling of 670165 in words is "six hundred seventy thousand, one hundred sixty-five".