66942 has 12 divisors (see below), whose sum is σ = 145080. Its totient is φ = 22308.

The previous prime is 66931. The next prime is 66943. The reversal of 66942 is 24966.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66943) by changing a digit.

66942 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 5 ways as a sum of consecutive naturals, for example, 1842 + ... + 1877.

It is an arithmetic number, because the mean of its divisors is an integer number (12090).

2⁶⁶⁹⁴² is an apocalyptic number.

66942 is an abundant number, since it is smaller than the sum of its proper divisors (78138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66942 is a wasteful number, since it uses less digits than its factorization.

66942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3727 (or 3724 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 66942 is about 258.7315210793. The cubic root of 66942 is about 40.6037577309.

The spelling of 66942 in words is "sixty-six thousand, nine hundred forty-two".