66448 has 10 divisors (see below), whose sum is σ = 128774. Its totient is φ = 33216.

The previous prime is 66431. The next prime is 66449. The reversal of 66448 is 84466.

It can be written as a sum of positive squares in only one way, i.e., 36864 + 29584 = 192^2 + 172^2 .

It is not an unprimeable number, because it can be changed into a prime (66449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2061 + ... + 2092.

2⁶⁶⁴⁴⁸ is an apocalyptic number.

It is an amenable number.

66448 is a deficient number, since it is larger than the sum of its proper divisors (62326).

66448 is a wasteful number, since it uses less digits than its factorization.

66448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161 (or 4155 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 66448 is about 257.7750957715. The cubic root of 66448 is about 40.5036322506.

The spelling of 66448 in words is "sixty-six thousand, four hundred forty-eight".