442006666 has 16 divisors (see below), whose sum is σ = 673550208. Its totient is φ = 217501200.

The previous prime is 442006657. The next prime is 442006693. The reversal of 442006666 is 666600244.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87136 + ... + 92068.

It is an arithmetic number, because the mean of its divisors is an integer number (42096888).

Almost surely, 2^442006666 is an apocalyptic number.

442006666 is a deficient number, since it is larger than the sum of its proper divisors (231543542).

442006666 is a wasteful number, since it uses less digits than its factorization.

442006666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 442006666 is about 21023.9545756739. The cubic root of 442006666 is about 761.7449896766.

The spelling of 442006666 in words is "four hundred forty-two million, six thousand, six hundred sixty-six".