166642 has 8 divisors (see below), whose sum is σ = 285696. Its totient is φ = 71412.

The previous prime is 166631. The next prime is 166643. The reversal of 166642 is 246661.

It is a happy number.

166642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (166643) by changing a digit.

166642 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 in 3 ways as a sum of consecutive naturals, for example, 5938 + ... + 5965.

It is an arithmetic number, because the mean of its divisors is an integer number (35712).

2¹⁶⁶⁶⁴² is an apocalyptic number.

166642 is a deficient number, since it is larger than the sum of its proper divisors (119054).

166642 is a wasteful number, since it uses less digits than its factorization.

166642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11912.

The product of its digits is 1728, while the sum is 25.

The square root of 166642 is about 408.2180789725. The cubic root of 166642 is about 55.0294057630.

It can be divided in two parts, 166 and 642, that added together give a palindrome (808).

The spelling of 166642 in words is "one hundred sixty-six thousand, six hundred forty-two".