442256666 has 16 divisors (see below), whose sum is σ = 702820800. Its totient is φ = 207998400.

The previous prime is 442256629. The next prime is 442256669. The reversal of 442256666 is 666652244.

It is not an unprimeable number, because it can be changed into a prime (442256669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84185 + ... + 89283.

It is an arithmetic number, because the mean of its divisors is an integer number (43926300).

Almost surely, 2^442256666 is an apocalyptic number.

442256666 is a deficient number, since it is larger than the sum of its proper divisors (260564134).

442256666 is a wasteful number, since it uses less digits than its factorization.

442256666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7669.

The product of its digits is 414720, while the sum is 41.

The square root of 442256666 is about 21029.8993340434. The cubic root of 442256666 is about 761.8885775224. Note that the first 3 decimals are identical.

The spelling of 442256666 in words is "four hundred forty-two million, two hundred fifty-six thousand, six hundred sixty-six".