66560444 has 12 divisors (see below), whose sum is σ = 117091968. Its totient is φ = 33105600.

The previous prime is 66560419. The next prime is 66560449. The reversal of 66560444 is 44406566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66560449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42797 + ... + 44324.

It is an arithmetic number, because the mean of its divisors is an integer number (9757664).

Almost surely, 2^66560444 is an apocalyptic number.

It is an amenable number.

66560444 is a deficient number, since it is larger than the sum of its proper divisors (50531524).

66560444 is a wasteful number, since it uses less digits than its factorization.

66560444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87316 (or 87314 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 66560444 is about 8158.4584328168. The cubic root of 66560444 is about 405.2646626534.

The spelling of 66560444 in words is "sixty-six million, five hundred sixty thousand, four hundred forty-four".