442666 has 12 divisors (see below), whose sum is σ = 772578. Its totient is φ = 189672.

The previous prime is 442633. The next prime is 442691. The reversal of 442666 is 666244.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 441 = 665^2 + 21^2 .

442666 is a modest number, since divided by 666 gives 442 as remainder.

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, 2161 + ... + 2356.

2⁴⁴²⁶⁶⁶ is an apocalyptic number.

442666 is a deficient number, since it is larger than the sum of its proper divisors (329912).

442666 is a wasteful number, since it uses less digits than its factorization.

442666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533 (or 4526 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 442666 is about 665.3314963234. The cubic root of 442666 is about 76.2123562284.

The spelling of 442666 in words is "four hundred forty-two thousand, six hundred sixty-six".