66233620 has 24 divisors (see below), whose sum is σ = 146412000. Its totient is φ = 25098912.

The previous prime is 66233597. The next prime is 66233621. The reversal of 66233620 is 2633266.

66233620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66233621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86770 + ... + 87529.

It is an arithmetic number, because the mean of its divisors is an integer number (6100500).

Almost surely, 2^66233620 is an apocalyptic number.

It is an amenable number.

66233620 is an abundant number, since it is smaller than the sum of its proper divisors (80178380).

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

66233620 is a wasteful number, since it uses less digits than its factorization.

66233620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174327 (or 174325 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 66233620 is about 8138.4040204453. The cubic root of 66233620 is about 404.6002660619.

Adding to 66233620 its reverse (2633266), we get a palindrome (68866886).

The spelling of 66233620 in words is "sixty-six million, two hundred thirty-three thousand, six hundred twenty".