166654 has 8 divisors (see below), whose sum is σ = 252720. Its totient is φ = 82416.

The previous prime is 166643. The next prime is 166657. The reversal of 166654 is 456661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199 + ... + 610.

It is an arithmetic number, because the mean of its divisors is an integer number (31590).

2¹⁶⁶⁶⁵⁴ is an apocalyptic number.

166654 is a deficient number, since it is larger than the sum of its proper divisors (86066).

166654 is a wasteful number, since it uses less digits than its factorization.

166654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914.

The product of its digits is 4320, while the sum is 28.

The square root of 166654 is about 408.2327767341. The cubic root of 166654 is about 55.0307266325.

It can be divided in two parts, 166 and 654, that added together give a triangular number (820 = T₄₀).

The spelling of 166654 in words is "one hundred sixty-six thousand, six hundred fifty-four".