442874666 has 8 divisors (see below), whose sum is σ = 715412964. Its totient is φ = 204403680.

The previous prime is 442874659. The next prime is 442874669. The reversal of 442874666 is 666478244.

It can be written as a sum of positive squares in 2 ways, for example, as 427042225 + 15832441 = 20665^2 + 3979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×442874666² = 392275939569223112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 442874666.

It is not an unprimeable number, because it can be changed into a prime (442874669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8516795 + ... + 8516846.

Almost surely, 2^442874666 is an apocalyptic number.

442874666 is a deficient number, since it is larger than the sum of its proper divisors (272538298).

442874666 is a wasteful number, since it uses less digits than its factorization.

442874666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17033656.

The product of its digits is 1548288, while the sum is 47.

The square root of 442874666 is about 21044.5875702044. The cubic root of 442874666 is about 762.2432946131.

The spelling of 442874666 in words is "four hundred forty-two million, eight hundred seventy-four thousand, six hundred sixty-six".