66389318 has 8 divisors (see below), whose sum is σ = 105441912. Its totient is φ = 31242016.

The previous prime is 66389299. The next prime is 66389329. The reversal of 66389318 is 81398366.

66389318 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.

It is a Curzon number.

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, 976280 + ... + 976347.

It is an arithmetic number, because the mean of its divisors is an integer number (13180239).

Almost surely, 2^66389318 is an apocalyptic number.

66389318 is a deficient number, since it is larger than the sum of its proper divisors (39052594).

66389318 is a wasteful number, since it uses less digits than its factorization.

66389318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952646.

The product of its digits is 186624, while the sum is 44.

The square root of 66389318 is about 8147.9640401759. The cubic root of 66389318 is about 404.9170545983.

The spelling of 66389318 in words is "sixty-six million, three hundred eighty-nine thousand, three hundred eighteen".