172066 has 8 divisors (see below), whose sum is σ = 259920. Its totient is φ = 85428.

The previous prime is 172049. The next prime is 172069. The reversal of 172066 is 660271.

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

It is not an unprimeable number, because it can be changed into a prime (172069) by changing a digit.

172066 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265 + ... + 643.

It is an arithmetic number, because the mean of its divisors is an integer number (32490).

2¹⁷²⁰⁶⁶ is an apocalyptic number.

172066 is a deficient number, since it is larger than the sum of its proper divisors (87854).

172066 is a wasteful number, since it uses less digits than its factorization.

172066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 172066 is about 414.8083895005. The cubic root of 172066 is about 55.6200900434.

The spelling of 172066 in words is "one hundred seventy-two thousand, sixty-six".