444444456666666 has 16 divisors (see below), whose sum is σ = 888997752529344. Its totient is φ = 148130012356224.

The previous prime is 444444456666641. The next prime is 444444456666671. The reversal of 444444456666666 is 666666654444444.

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, 4534913415 + ... + 4535011418.

It is an arithmetic number, because the mean of its divisors is an integer number (55562359533084).

Almost surely, 2^{444444456666666} is an apocalyptic number.

444444456666666 is an abundant number, since it is smaller than the sum of its proper divisors (444553295862678).

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

444444456666666 is a wasteful number, since it uses less digits than its factorization.

444444456666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069933005.

The product of its digits is 22932357120, while the sum is 75.

The spelling of 444444456666666 in words is "four hundred forty-four trillion, four hundred forty-four billion, four hundred fifty-six million, six hundred sixty-six thousand, six hundred sixty-six".