66449448 has 144 divisors (see below), whose sum is σ = 200977920. Its totient is φ = 19813248.

The previous prime is 66449437. The next prime is 66449497. The reversal of 66449448 is 84494466.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 523161 + ... + 523287.

It is an arithmetic number, because the mean of its divisors is an integer number (1395680).

Almost surely, 2^66449448 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 66449448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100488960).

66449448 is an abundant number, since it is smaller than the sum of its proper divisors (134528472).

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

66449448 is a wasteful number, since it uses less digits than its factorization.

66449448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 188 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 66449448 is about 8151.6530838843. The cubic root of 66449448 is about 405.0392645974.

The spelling of 66449448 in words is "sixty-six million, four hundred forty-nine thousand, four hundred forty-eight".