66302320 has 80 divisors (see below), whose sum is σ = 177363648. Its totient is φ = 22579200.

The previous prime is 66302317. The next prime is 66302321. The reversal of 66302320 is 2320366.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 66302291 and 66302300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66302321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110020 + ... + 110620.

Almost surely, 2^66302320 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 66302320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88681824).

66302320 is an abundant number, since it is smaller than the sum of its proper divisors (111061328).

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

66302320 is a wasteful number, since it uses less digits than its factorization.

66302320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 66302320 is about 8142.6236558004. The cubic root of 66302320 is about 404.7401065912.

Adding to 66302320 its reverse (2320366), we get a palindrome (68622686).

The spelling of 66302320 in words is "sixty-six million, three hundred two thousand, three hundred twenty".