66170 has 16 divisors (see below), whose sum is σ = 128520. Its totient is φ = 24384.

The previous prime is 66169. The next prime is 66173. The reversal of 66170 is 7166.

It can be written as a sum of positive squares in 4 ways, for example, as 51529 + 14641 = 227^2 + 121^2 .

It is not an unprimeable number, because it can be changed into a prime (66173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125 + ... + 384.

2⁶⁶¹⁷⁰ is an apocalyptic number.

66170 is a deficient number, since it is larger than the sum of its proper divisors (62350).

66170 is a wasteful number, since it uses less digits than its factorization.

66170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 66170 is about 257.2353008434. The cubic root of 66170 is about 40.4470679733.

The spelling of 66170 in words is "sixty-six thousand, one hundred seventy".