66442242 has 8 divisors (see below), whose sum is σ = 132884496. Its totient is φ = 22147412.

The previous prime is 66442241. The next prime is 66442253. The reversal of 66442242 is 24224466.

66442242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

66442242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66442241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5536848 + ... + 5536859.

It is an arithmetic number, because the mean of its divisors is an integer number (16610562).

Almost surely, 2^66442242 is an apocalyptic number.

66442242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66442242 is a wasteful number, since it uses less digits than its factorization.

66442242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11073712.

The product of its digits is 18432, while the sum is 30.

The square root of 66442242 is about 8151.2110756623. The cubic root of 66442242 is about 405.0246227981.

The spelling of 66442242 in words is "sixty-six million, four hundred forty-two thousand, two hundred forty-two".