670185 has 24 divisors (see below), whose sum is σ = 1187784. Its totient is φ = 349440.

The previous prime is 670177. The next prime is 670193. The reversal of 670185 is 581076.

It is an interprime number because it is at equal distance from previous prime (670177) and next prime (670193).

It can be written as a sum of positive squares in 4 ways, for example, as 168921 + 501264 = 411^2 + 708^2 .

It is not a de Polignac number, because 670185 - 2³ = 670177 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 2245 + ... + 2525.

It is an arithmetic number, because the mean of its divisors is an integer number (49491).

2⁶⁷⁰¹⁸⁵ is an apocalyptic number.

It is an amenable number.

670185 is a deficient number, since it is larger than the sum of its proper divisors (517599).

670185 is a wasteful number, since it uses less digits than its factorization.

670185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 670185 is about 818.6482761235. The cubic root of 670185 is about 87.5114542828.

It can be divided in two parts, 6701 and 85, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 670185 in words is "six hundred seventy thousand, one hundred eighty-five".