66386682 has 64 divisors (see below), whose sum is σ = 152755200. Its totient is φ = 21360240.

The previous prime is 66386681. The next prime is 66386689. The reversal of 66386682 is 28668366.

66386682 is a `hidden beast` number, since 6 + 638 + 6 + 6 + 8 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66386681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213307 + ... + 213617.

It is an arithmetic number, because the mean of its divisors is an integer number (2386800).

Almost surely, 2^66386682 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66386682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76377600).

66386682 is an abundant number, since it is smaller than the sum of its proper divisors (86368518).

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

66386682 is a wasteful number, since it uses less digits than its factorization.

66386682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 442 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 66386682 is about 8147.8022803698. The cubic root of 66386682 is about 404.9116954255.

The spelling of 66386682 in words is "sixty-six million, three hundred eighty-six thousand, six hundred eighty-two".