444456666 has 16 divisors (see below), whose sum is σ = 987681600. Its totient is φ = 148152204.

The previous prime is 444456659. The next prime is 444456679. The reversal of 444456666 is 666654444.

It is a plaindrome in base 10.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4115286 + ... + 4115393.

It is an arithmetic number, because the mean of its divisors is an integer number (61730100).

Almost surely, 2^444456666 is an apocalyptic number.

444456666 is an abundant number, since it is smaller than the sum of its proper divisors (543224934).

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

444456666 is a wasteful number, since it uses less digits than its factorization.

444456666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8230690 (or 8230684 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The square root of 444456666 is about 21082.1409254373. The cubic root of 444456666 is about 763.1498233991.

The spelling of 444456666 in words is "four hundred forty-four million, four hundred fifty-six thousand, six hundred sixty-six".