66631332 has 12 divisors (see below), whose sum is σ = 155473136. Its totient is φ = 22210440.

The previous prime is 66631319. The next prime is 66631343. The reversal of 66631332 is 23313666.

It is a tau number, because it is divible by the number of its divisors (12).

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 nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 66631332.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2776294 + ... + 2776317.

Almost surely, 2^66631332 is an apocalyptic number.

It is an amenable number.

66631332 is an abundant number, since it is smaller than the sum of its proper divisors (88841804).

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

66631332 is a wasteful number, since it uses less digits than its factorization.

66631332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552618 (or 5552616 counting only the distinct ones).

The product of its digits is 11664, while the sum is 30.

The square root of 66631332 is about 8162.8017248981. The cubic root of 66631332 is about 405.4084828514.

Adding to 66631332 its reverse (23313666), we get a palindrome (89944998).

The spelling of 66631332 in words is "sixty-six million, six hundred thirty-one thousand, three hundred thirty-two".