66032144 has 40 divisors (see below), whose sum is σ = 136345440. Its totient is φ = 30889728.

The previous prime is 66032143. The next prime is 66032147. The reversal of 66032144 is 44123066.

66032144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66032143) 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 7 ways as a sum of consecutive naturals, for example, 23924 + ... + 26540.

It is an arithmetic number, because the mean of its divisors is an integer number (3408636).

Almost surely, 2^66032144 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 66032144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68172720).

66032144 is an abundant number, since it is smaller than the sum of its proper divisors (70313296).

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

66032144 is a wasteful number, since it uses less digits than its factorization.

66032144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727 (or 2721 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66032144 is about 8126.0164902614. The cubic root of 66032144 is about 404.1895982926.

The spelling of 66032144 in words is "sixty-six million, thirty-two thousand, one hundred forty-four".