66448864 has 24 divisors (see below), whose sum is σ = 134014608. Its totient is φ = 32413440.

The previous prime is 66448853. The next prime is 66448919. The reversal of 66448864 is 46884466.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24012 + ... + 26635.

It is an arithmetic number, because the mean of its divisors is an integer number (5583942).

Almost surely, 2^66448864 is an apocalyptic number.

It is an amenable number.

66448864 is an abundant number, since it is smaller than the sum of its proper divisors (67565744).

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

66448864 is a wasteful number, since it uses less digits than its factorization.

66448864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50698 (or 50690 counting only the distinct ones).

The product of its digits is 884736, while the sum is 46.

The square root of 66448864 is about 8151.6172628504. The cubic root of 66448864 is about 405.0380780131.

The spelling of 66448864 in words is "sixty-six million, four hundred forty-eight thousand, eight hundred sixty-four".