166954 has 4 divisors (see below), whose sum is σ = 250434. Its totient is φ = 83476.

The previous prime is 166949. The next prime is 166967. The reversal of 166954 is 459661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 459661 = 173 ⋅2657.

It can be written as a sum of positive squares in only one way, i.e., 106929 + 60025 = 327^2 + 245^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 3.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 41737 + ... + 41740.

2¹⁶⁶⁹⁵⁴ is an apocalyptic number.

166954 is a deficient number, since it is larger than the sum of its proper divisors (83480).

166954 is an equidigital number, since it uses as much as digits as its factorization.

166954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83479.

The product of its digits is 6480, while the sum is 31.

The square root of 166954 is about 408.6000489476. The cubic root of 166954 is about 55.0637277838.

The spelling of 166954 in words is "one hundred sixty-six thousand, nine hundred fifty-four".