660173 has 4 divisors (see below), whose sum is σ = 661980. Its totient is φ = 658368.

The previous prime is 660167. The next prime is 660181. The reversal of 660173 is 371066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371066 = 2 ⋅185533.

It can be written as a sum of positive squares in 2 ways, for example, as 619369 + 40804 = 787^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 660173 - 2⁴ = 660157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (165495).

2⁶⁶⁰¹⁷³ is an apocalyptic number.

It is an amenable number.

660173 is a deficient number, since it is larger than the sum of its proper divisors (1807).

660173 is a wasteful number, since it uses less digits than its factorization.

660173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 660173 is about 812.5103076269. The cubic root of 660173 is about 87.0734835182.

The spelling of 660173 in words is "six hundred sixty thousand, one hundred seventy-three".