65448081 has 20 divisors (see below), whose sum is σ = 98433984. Its totient is φ = 43335000.

The previous prime is 65448067. The next prime is 65448109. The reversal of 65448081 is 18084456.

65448081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65448081 - 2⁵ = 65448049 is a prime.

It is a super-2 number, since 2×65448081² = 8566902613165122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65448001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9556 + ... + 14906.

Almost surely, 2^65448081 is an apocalyptic number.

It is an amenable number.

65448081 is a deficient number, since it is larger than the sum of its proper divisors (32985903).

65448081 is a wasteful number, since it uses less digits than its factorization.

65448081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514 (or 5505 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 65448081 is about 8089.9988257107. The cubic root of 65448081 is about 402.9943639445.

The spelling of 65448081 in words is "sixty-five million, four hundred forty-eight thousand, eighty-one".