66446243 has 8 divisors (see below), whose sum is σ = 67359600. Its totient is φ = 65536768.

The previous prime is 66446239. The next prime is 66446267. The reversal of 66446243 is 34264466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66446243 - 2² = 66446239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66446293) 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 7 ways as a sum of consecutive naturals, for example, 52148 + ... + 53406.

It is an arithmetic number, because the mean of its divisors is an integer number (8419950).

Almost surely, 2^66446243 is an apocalyptic number.

66446243 is a deficient number, since it is larger than the sum of its proper divisors (913357).

66446243 is a wasteful number, since it uses less digits than its factorization.

66446243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941.

The product of its digits is 82944, while the sum is 35.

The square root of 66446243 is about 8151.4564956209. The cubic root of 66446243 is about 405.0327525207.

The spelling of 66446243 in words is "sixty-six million, four hundred forty-six thousand, two hundred forty-three".