66895584 has 72 divisors (see below), whose sum is σ = 204284808. Its totient is φ = 19111680.

The previous prime is 66895583. The next prime is 66895597. The reversal of 66895584 is 48559866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66895583) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2407 + ... + 11814.

It is an arithmetic number, because the mean of its divisors is an integer number (2837289).

Almost surely, 2^66895584 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 66895584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102142404).

66895584 is an abundant number, since it is smaller than the sum of its proper divisors (137389224).

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

66895584 is a wasteful number, since it uses less digits than its factorization.

66895584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14248 (or 14233 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 51.

The square root of 66895584 is about 8178.9720625516. The cubic root of 66895584 is about 405.9437099923.

The spelling of 66895584 in words is "sixty-six million, eight hundred ninety-five thousand, five hundred eighty-four".