66232320 has 336 divisors, whose sum is σ = 268943328. Its totient is φ = 13762560.

The previous prime is 66232319. The next prime is 66232333. The reversal of 66232320 is 2323266.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6021115 + ... + 6021125.

Almost surely, 2^66232320 is an apocalyptic number.

66232320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66232320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134471664).

66232320 is an abundant number, since it is smaller than the sum of its proper divisors (202711008).

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

66232320 is a wasteful number, since it uses less digits than its factorization.

66232320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 66232320 is about 8138.3241518141. The cubic root of 66232320 is about 404.5976189481.

Adding to 66232320 its reverse (2323266), we get a palindrome (68555586).

It can be divided in two parts, 6 and 6232320, that added together give a palindrome (6232326).

The spelling of 66232320 in words is "sixty-six million, two hundred thirty-two thousand, three hundred twenty".