166466 has 4 divisors (see below), whose sum is σ = 249702. Its totient is φ = 83232.

The previous prime is 166457. The next prime is 166471. The reversal of 166466 is 664661.

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

It can be written as a sum of positive squares in only one way, i.e., 93025 + 73441 = 305^2 + 271^2 .

It is a Curzon 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 166466.

It is an unprimeable number.

166466 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41615 + ... + 41618.

2¹⁶⁶⁴⁶⁶ is an apocalyptic number.

166466 is a deficient number, since it is larger than the sum of its proper divisors (83236).

166466 is an equidigital number, since it uses as much as digits as its factorization.

166466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83235.

The product of its digits is 5184, while the sum is 29.

The square root of 166466 is about 408.0024509730. The cubic root of 166466 is about 55.0100257206.

The spelling of 166466 in words is "one hundred sixty-six thousand, four hundred sixty-six".