66320332 has 72 divisors (see below), whose sum is σ = 138348000. Its totient is φ = 27675648.

The previous prime is 66320327. The next prime is 66320333. The reversal of 66320332 is 23302366.

It is a junction number, because it is equal to n+sod(n) for n = 66320297 and 66320306.

It is not an unprimeable number, because it can be changed into a prime (66320333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333169 + ... + 333367.

It is an arithmetic number, because the mean of its divisors is an integer number (1921500).

Almost surely, 2^66320332 is an apocalyptic number.

It is an amenable number.

66320332 is an abundant number, since it is smaller than the sum of its proper divisors (72027668).

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

66320332 is a wasteful number, since it uses less digits than its factorization.

66320332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 66320332 is about 8143.7296124073. The cubic root of 66320332 is about 404.7767544729.

Adding to 66320332 its reverse (23302366), we get a palindrome (89622698).

The spelling of 66320332 in words is "sixty-six million, three hundred twenty thousand, three hundred thirty-two".