66015232 has 52 divisors (see below), whose sum is σ = 134463456. Its totient is φ = 32399360.

The previous prime is 66015227. The next prime is 66015239. The reversal of 66015232 is 23251066.

It is a junction number, because it is equal to n+sod(n) for n = 66015197 and 66015206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66015239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290703 + ... + 290929.

Almost surely, 2^66015232 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 66015232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67231728).

66015232 is an abundant number, since it is smaller than the sum of its proper divisors (68448224).

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

66015232 is an equidigital number, since it uses as much as digits as its factorization.

66015232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66015232 is about 8124.9758153486. The cubic root of 66015232 is about 404.1550886446.

Adding to 66015232 its reverse (23251066), we get a palindrome (89266298).

The spelling of 66015232 in words is "sixty-six million, fifteen thousand, two hundred thirty-two".