442115666 has 8 divisors (see below), whose sum is σ = 663452940. Its totient is φ = 220964688.

The previous prime is 442115659. The next prime is 442115671. The reversal of 442115666 is 666511244.

It can be written as a sum of positive squares in 2 ways, for example, as 341695225 + 100420441 = 18485^2 + 10021^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40481 + ... + 50228.

Almost surely, 2^442115666 is an apocalyptic number.

442115666 is a deficient number, since it is larger than the sum of its proper divisors (221337274).

442115666 is a wasteful number, since it uses less digits than its factorization.

442115666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93148.

The product of its digits is 34560, while the sum is 35.

The square root of 442115666 is about 21026.5466969733. The cubic root of 442115666 is about 761.8076006326.

The spelling of 442115666 in words is "four hundred forty-two million, one hundred fifteen thousand, six hundred sixty-six".