166942 has 4 divisors (see below), whose sum is σ = 250416. Its totient is φ = 83470.

The previous prime is 166931. The next prime is 166949. The reversal of 166942 is 249661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249661 = 29 ⋅8609.

It is a self number, because there is not a number n which added to its sum of digits gives 166942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166949) by changing a digit.

166942 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, 41734 + ... + 41737.

It is an arithmetic number, because the mean of its divisors is an integer number (62604).

2¹⁶⁶⁹⁴² is an apocalyptic number.

166942 is a deficient number, since it is larger than the sum of its proper divisors (83474).

166942 is an equidigital number, since it uses as much as digits as its factorization.

166942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83473.

The product of its digits is 2592, while the sum is 28.

The square root of 166942 is about 408.5853643977. The cubic root of 166942 is about 55.0624084971.

It can be divided in two parts, 1669 and 42, that added together give a triangular number (1711 = T₅₈).

The spelling of 166942 in words is "one hundred sixty-six thousand, nine hundred forty-two".