66444014 has 32 divisors (see below), whose sum is σ = 123404736. Its totient is φ = 26127360.

The previous prime is 66444011. The next prime is 66444019. The reversal of 66444014 is 41044466.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66444011) 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, 31934 + ... + 33950.

It is an arithmetic number, because the mean of its divisors is an integer number (3856398).

Almost surely, 2^66444014 is an apocalyptic number.

66444014 is a deficient number, since it is larger than the sum of its proper divisors (56960722).

66444014 is a wasteful number, since it uses less digits than its factorization.

66444014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 66444014 is about 8151.3197704421. The cubic root of 66444014 is about 405.0282234053.

The spelling of 66444014 in words is "sixty-six million, four hundred forty-four thousand, fourteen".