66533232 has 40 divisors (see below), whose sum is σ = 175127184. Its totient is φ = 21758464.

The previous prime is 66533219. The next prime is 66533239. The reversal of 66533232 is 23233566.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66533232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66533239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10533 + ... + 15620.

Almost surely, 2^66533232 is an apocalyptic number.

It is an amenable number.

66533232 is an abundant number, since it is smaller than the sum of its proper divisors (108593952).

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

66533232 is a wasteful number, since it uses less digits than its factorization.

66533232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26217 (or 26211 counting only the distinct ones).

The product of its digits is 19440, while the sum is 30.

The square root of 66533232 is about 8156.7905453064. The cubic root of 66533232 is about 405.2094268179.

Adding to 66533232 its reverse (23233566), we get a palindrome (89766798).

The spelling of 66533232 in words is "sixty-six million, five hundred thirty-three thousand, two hundred thirty-two".