66044412 has 72 divisors (see below), whose sum is σ = 192288096. Its totient is φ = 18722304.

The previous prime is 66044401. The next prime is 66044443. The reversal of 66044412 is 21444066.

66044412 is a `hidden beast` number, since 6 + 604 + 44 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33568 + ... + 35480.

It is an arithmetic number, because the mean of its divisors is an integer number (2670668).

Almost surely, 2^66044412 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 66044412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96144048).

66044412 is an abundant number, since it is smaller than the sum of its proper divisors (126243684).

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

66044412 is a wasteful number, since it uses less digits than its factorization.

66044412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 66044412 is about 8126.7713146120. The cubic root of 66044412 is about 404.2146279759.

Adding to 66044412 its reverse (21444066), we get a palindrome (87488478).

The spelling of 66044412 in words is "sixty-six million, forty-four thousand, four hundred twelve".