66448746 has 96 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 17321472.

The previous prime is 66448727. The next prime is 66448751. The reversal of 66448746 is 64784466.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184915 + ... + 185273.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^66448746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66448746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89631360).

66448746 is an abundant number, since it is smaller than the sum of its proper divisors (112813974).

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

66448746 is a wasteful number, since it uses less digits than its factorization.

66448746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 497 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 66448746 is about 8151.6100250196. The cubic root of 66448746 is about 405.0378382572.

The spelling of 66448746 in words is "sixty-six million, four hundred forty-eight thousand, seven hundred forty-six".