442206666 has 48 divisors (see below), whose sum is σ = 1064962080. Its totient is φ = 131470560.

The previous prime is 442206659. The next prime is 442206697. The reversal of 442206666 is 666602244.

It is a self number, because there is not a number n which added to its sum of digits gives 442206666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10576 + ... + 31563.

It is an arithmetic number, because the mean of its divisors is an integer number (22186710).

Almost surely, 2^442206666 is an apocalyptic number.

442206666 is an abundant number, since it is smaller than the sum of its proper divisors (622755414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442206666 is a wasteful number, since it uses less digits than its factorization.

442206666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42211 (or 42208 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 442206666 is about 21028.7105168149. The cubic root of 442206666 is about 761.8598642830.

The spelling of 442206666 in words is "four hundred forty-two million, two hundred six thousand, six hundred sixty-six".