666442080443 has 16 divisors (see below), whose sum is σ = 675024910560. Its totient is φ = 657906955776.

The previous prime is 666442080413. The next prime is 666442080517. The reversal of 666442080443 is 344080244666.

It is a cyclic number.

It is not a de Polignac number, because 666442080443 - 2¹⁰ = 666442079419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666442080413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60126380 + ... + 60137462.

It is an arithmetic number, because the mean of its divisors is an integer number (42189056910).

Almost surely, 2^666442080443 is an apocalyptic number.

666442080443 is a deficient number, since it is larger than the sum of its proper divisors (8582830117).

666442080443 is a wasteful number, since it uses less digits than its factorization.

666442080443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13166.

The product of its (nonzero) digits is 2654208, while the sum is 47.

The spelling of 666442080443 in words is "six hundred sixty-six billion, four hundred forty-two million, eighty thousand, four hundred forty-three".