166456 has 8 divisors (see below), whose sum is σ = 312120. Its totient is φ = 83224.

The previous prime is 166429. The next prime is 166457. The reversal of 166456 is 654661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166457) 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 as a sum of consecutive naturals, namely, 10396 + ... + 10411.

It is an arithmetic number, because the mean of its divisors is an integer number (39015).

2¹⁶⁶⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

166456 is a deficient number, since it is larger than the sum of its proper divisors (145664).

166456 is a wasteful number, since it uses less digits than its factorization.

166456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20813 (or 20809 counting only the distinct ones).

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

The square root of 166456 is about 407.9901959606. The cubic root of 166456 is about 55.0089241717.

The spelling of 166456 in words is "one hundred sixty-six thousand, four hundred fifty-six".