66333740 has 48 divisors (see below), whose sum is σ = 154859040. Its totient is φ = 23662080.

The previous prime is 66333739. The next prime is 66333763. The reversal of 66333740 is 4733366.

66333740 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 = 66333697 and 66333706.

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 15 ways as a sum of consecutive naturals, for example, 8816 + ... + 14504.

It is an arithmetic number, because the mean of its divisors is an integer number (3226230).

Almost surely, 2^66333740 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 66333740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77429520).

66333740 is an abundant number, since it is smaller than the sum of its proper divisors (88525300).

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

66333740 is a wasteful number, since it uses less digits than its factorization.

66333740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762 (or 5760 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 32.

The square root of 66333740 is about 8144.5527808468. The cubic root of 66333740 is about 404.8040305780.

The spelling of 66333740 in words is "sixty-six million, three hundred thirty-three thousand, seven hundred forty".