66005448 has 64 divisors (see below), whose sum is σ = 172646400. Its totient is φ = 21003840.

The previous prime is 66005389. The next prime is 66005453. The reversal of 66005448 is 84450066.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58215 + ... + 59337.

It is an arithmetic number, because the mean of its divisors is an integer number (2697600).

Almost surely, 2^66005448 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 66005448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86323200).

66005448 is an abundant number, since it is smaller than the sum of its proper divisors (106640952).

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

66005448 is a wasteful number, since it uses less digits than its factorization.

66005448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 66005448 is about 8124.3736989383. The cubic root of 66005448 is about 404.1351212894.

The spelling of 66005448 in words is "sixty-six million, five thousand, four hundred forty-eight".