66867752 has 48 divisors (see below), whose sum is σ = 149276160. Its totient is φ = 27984096.

The previous prime is 66867743. The next prime is 66867797. The reversal of 66867752 is 25776866.

66867752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66867697 and 66867706.

It is an unprimeable number.

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, 14873 + ... + 18839.

It is an arithmetic number, because the mean of its divisors is an integer number (3109920).

Almost surely, 2^66867752 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 66867752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74638080).

66867752 is an abundant number, since it is smaller than the sum of its proper divisors (82408408).

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

66867752 is a wasteful number, since it uses less digits than its factorization.

66867752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030 (or 4019 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 66867752 is about 8177.2704492392. The cubic root of 66867752 is about 405.8874043694.

The spelling of 66867752 in words is "sixty-six million, eight hundred sixty-seven thousand, seven hundred fifty-two".