66447304 has 64 divisors (see below), whose sum is σ = 156297600. Its totient is φ = 25728000.

The previous prime is 66447287. The next prime is 66447307. The reversal of 66447304 is 40374466.

It is a self number, because there is not a number n which added to its sum of digits gives 66447304.

It is not an unprimeable number, because it can be changed into a prime (66447307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165504 + ... + 165904.

It is an arithmetic number, because the mean of its divisors is an integer number (2442150).

Almost surely, 2^66447304 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 66447304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78148800).

66447304 is an abundant number, since it is smaller than the sum of its proper divisors (89850296).

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

66447304 is a wasteful number, since it uses less digits than its factorization.

66447304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 66447304 is about 8151.5215757550. The cubic root of 66447304 is about 405.0349083359.

The spelling of 66447304 in words is "sixty-six million, four hundred forty-seven thousand, three hundred four".