66525472 has 48 divisors (see below), whose sum is σ = 144365760. Its totient is φ = 29981952.

The previous prime is 66525467. The next prime is 66525523. The reversal of 66525472 is 27452566.

66525472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 16029 + ... + 19747.

It is an arithmetic number, because the mean of its divisors is an integer number (3007620).

Almost surely, 2^66525472 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 66525472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72182880).

66525472 is an abundant number, since it is smaller than the sum of its proper divisors (77840288).

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

66525472 is a wasteful number, since it uses less digits than its factorization.

66525472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785 (or 3777 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 66525472 is about 8156.3148541483. The cubic root of 66525472 is about 405.1936725484.

The spelling of 66525472 in words is "sixty-six million, five hundred twenty-five thousand, four hundred seventy-two".