442006665 has 8 divisors (see below), whose sum is σ = 707210688. Its totient is φ = 235736880.

The previous prime is 442006657. The next prime is 442006693. The reversal of 442006665 is 566600244.

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

It is not a de Polignac number, because 442006665 - 2³ = 442006657 is a prime.

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, 14733541 + ... + 14733570.

It is an arithmetic number, because the mean of its divisors is an integer number (88401336).

Almost surely, 2^442006665 is an apocalyptic number.

It is an amenable number.

442006665 is a deficient number, since it is larger than the sum of its proper divisors (265204023).

442006665 is a wasteful number, since it uses less digits than its factorization.

442006665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29467119.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 442006665 is about 21023.9545518915. The cubic root of 442006665 is about 761.7449891022.

The spelling of 442006665 in words is "four hundred forty-two million, six thousand, six hundred sixty-five".