66324707064 has 640 divisors, whose sum is σ = 249623193600. Its totient is φ = 15931157760.

The previous prime is 66324707039. The next prime is 66324707077. The reversal of 66324707064 is 46070742366.

66324707064 is a `hidden beast` number, since 6 + 632 + 4 + 7 + 0 + 7 + 0 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 40764219 + ... + 40765845.

It is an arithmetic number, because the mean of its divisors is an integer number (390036240).

Almost surely, 2^66324707064 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 66324707064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124811596800).

66324707064 is an abundant number, since it is smaller than the sum of its proper divisors (183298486536).

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

66324707064 is a wasteful number, since it uses less digits than its factorization.

66324707064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725 (or 1712 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 66324707064 in words is "sixty-six billion, three hundred twenty-four million, seven hundred seven thousand, sixty-four".