444555555555666 has 32 divisors (see below), whose sum is σ = 913142471592960. Its totient is φ = 144179970109056.

The previous prime is 444555555555479. The next prime is 444555555555691. The reversal of 444555555555666 is 666555555555444.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244252150 + ... + 246065486.

It is an arithmetic number, because the mean of its divisors is an integer number (28535702237280).

Almost surely, 2^{444555555555666} is an apocalyptic number.

444555555555666 is an abundant number, since it is smaller than the sum of its proper divisors (468586916037294).

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

444555555555666 is a wasteful number, since it uses less digits than its factorization.

444555555555666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917698.

The product of its digits is 27000000000, while the sum is 75.

The spelling of 444555555555666 in words is "four hundred forty-four trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, six hundred sixty-six".