66427648 has 72 divisors (see below), whose sum is σ = 159595520. Its totient is φ = 26956800.

The previous prime is 66427643. The next prime is 66427649. The reversal of 66427648 is 84672466.

66427648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66427643) 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 7 ways as a sum of consecutive naturals, for example, 33073 + ... + 35023.

Almost surely, 2^66427648 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 66427648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79797760).

66427648 is an abundant number, since it is smaller than the sum of its proper divisors (93167872).

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

66427648 is a wasteful number, since it uses less digits than its factorization.

66427648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993 (or 1979 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 66427648 is about 8150.3158221016. The cubic root of 66427648 is about 404.9949661519.

The spelling of 66427648 in words is "sixty-six million, four hundred twenty-seven thousand, six hundred forty-eight".