442666406642 has 8 divisors (see below), whose sum is σ = 664015400832. Its totient is φ = 221327939700.

The previous prime is 442666406627. The next prime is 442666406653. The reversal of 442666406642 is 246604666244.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525834 + ... + 2695397.

It is an arithmetic number, because the mean of its divisors is an integer number (83001925104).

Almost surely, 2^442666406642 is an apocalyptic number.

442666406642 is a deficient number, since it is larger than the sum of its proper divisors (221348994190).

442666406642 is a wasteful number, since it uses less digits than its factorization.

442666406642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263624.

The product of its (nonzero) digits is 7962624, while the sum is 50.

The spelling of 442666406642 in words is "four hundred forty-two billion, six hundred sixty-six million, four hundred six thousand, six hundred forty-two".