66252330 has 80 divisors (see below), whose sum is σ = 179397504. Its totient is φ = 17543520.

The previous prime is 66252317. The next prime is 66252337. The reversal of 66252330 is 3325266.

66252330 is a `hidden beast` number, since 6 + 625 + 2 + 3 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 66252294 and 66252303.

It is not an unprimeable number, because it can be changed into a prime (66252337) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 212875 + ... + 213185.

Almost surely, 2^66252330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66252330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89698752).

66252330 is an abundant number, since it is smaller than the sum of its proper divisors (113145174).

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

66252330 is a wasteful number, since it uses less digits than its factorization.

66252330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 66252330 is about 8139.5534275536. The cubic root of 66252330 is about 404.6383603020.

Adding to 66252330 its reverse (3325266), we get a palindrome (69577596).

The spelling of 66252330 in words is "sixty-six million, two hundred fifty-two thousand, three hundred thirty".