66478912 has 28 divisors (see below), whose sum is σ = 132974080. Its totient is φ = 32973696.

The previous prime is 66478897. The next prime is 66478921. The reversal of 66478912 is 21987466.

66478912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

66478912 is an admirable 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, 4039 + ... + 12217.

Almost surely, 2^66478912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66478912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66487040).

66478912 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.

66478912 is a wasteful number, since it uses less digits than its factorization.

66478912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8318 (or 8308 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 66478912 is about 8153.4601243889. The cubic root of 66478912 is about 405.0991211942.

The spelling of 66478912 in words is "sixty-six million, four hundred seventy-eight thousand, nine hundred twelve".