66329536 has 84 divisors (see below), whose sum is σ = 164991288. Its totient is φ = 26224128.

The previous prime is 66329503. The next prime is 66329537. The reversal of 66329536 is 63592366.

It is a happy number.

66329536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66329537) 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 11 ways as a sum of consecutive naturals, for example, 39955 + ... + 41581.

It is an arithmetic number, because the mean of its divisors is an integer number (1964182).

Almost surely, 2^66329536 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 66329536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82495644).

66329536 is an abundant number, since it is smaller than the sum of its proper divisors (98661752).

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

66329536 is a wasteful number, since it uses less digits than its factorization.

66329536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1649 counting only the distinct ones).

The product of its digits is 174960, while the sum is 40.

The square root of 66329536 is about 8144.2946901497. The cubic root of 66329536 is about 404.7954787103.

The spelling of 66329536 in words is "sixty-six million, three hundred twenty-nine thousand, five hundred thirty-six".