66605232 has 40 divisors (see below), whose sum is σ = 172560384. Its totient is φ = 22137664.

The previous prime is 66605221. The next prime is 66605233. The reversal of 66605232 is 23250666.

It is a self number, because there is not a number n which added to its sum of digits gives 66605232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66605233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16573 + ... + 20195.

Almost surely, 2^66605232 is an apocalyptic number.

It is an amenable number.

66605232 is an abundant number, since it is smaller than the sum of its proper divisors (105955152).

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

66605232 is a wasteful number, since it uses less digits than its factorization.

66605232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017 (or 4011 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 66605232 is about 8161.2028525212. The cubic root of 66605232 is about 405.3555420753.

Adding to 66605232 its reverse (23250666), we get a palindrome (89855898).

The spelling of 66605232 in words is "sixty-six million, six hundred five thousand, two hundred thirty-two".