666342 has 12 divisors (see below), whose sum is σ = 1443780. Its totient is φ = 222108.

The previous prime is 666329. The next prime is 666353. The reversal of 666342 is 243666.

666342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18492 + ... + 18527.

It is an arithmetic number, because the mean of its divisors is an integer number (120315).

2⁶⁶⁶³⁴² is an apocalyptic number.

666342 is an abundant number, since it is smaller than the sum of its proper divisors (777438).

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

666342 is a wasteful number, since it uses less digits than its factorization.

666342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37027 (or 37024 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 666342 is about 816.2977397984. The cubic root of 666342 is about 87.3438630481.

The spelling of 666342 in words is "six hundred sixty-six thousand, three hundred forty-two".