66389142 has 8 divisors (see below), whose sum is σ = 132778296. Its totient is φ = 22129712.

The previous prime is 66389129. The next prime is 66389179. The reversal of 66389142 is 24198366.

66389142 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.

66389142 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66389142.

It is a congruent number.

It is an unprimeable number.

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, 5532423 + ... + 5532434.

It is an arithmetic number, because the mean of its divisors is an integer number (16597287).

Almost surely, 2^66389142 is an apocalyptic number.

66389142 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.

66389142 is a wasteful number, since it uses less digits than its factorization.

66389142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064862.

The product of its digits is 62208, while the sum is 39.

The square root of 66389142 is about 8147.9532399247. The cubic root of 66389142 is about 404.9166967824.

The spelling of 66389142 in words is "sixty-six million, three hundred eighty-nine thousand, one hundred forty-two".