442206406666 has 16 divisors (see below), whose sum is σ = 664789279968. Its totient is φ = 220610250000.

The previous prime is 442206406651. The next prime is 442206406669. The reversal of 442206406666 is 666604602244.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (442206406669) 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, 3303541 + ... + 3434791.

It is an arithmetic number, because the mean of its divisors is an integer number (41549329998).

Almost surely, 2^442206406666 is an apocalyptic number.

442206406666 is a deficient number, since it is larger than the sum of its proper divisors (222582873302).

442206406666 is a wasteful number, since it uses less digits than its factorization.

442206406666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134997.

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 442206406666 in words is "four hundred forty-two billion, two hundred six million, four hundred six thousand, six hundred sixty-six".