66143232 has 66 divisors (see below), whose sum is σ = 191013758. Its totient is φ = 22044672.

The previous prime is 66143221. The next prime is 66143257. The reversal of 66143232 is 23234166.

It can be written as a sum of positive squares in only one way, i.e., 65028096 + 1115136 = 8064^2 + 1056^2 .

It is a hoax number, since the sum of its digits (27) 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 junction number, because it is equal to n+sod(n) for n = 66143196 and 66143205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5628 + ... + 12804.

Almost surely, 2^66143232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66143232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95506879).

66143232 is an abundant number, since it is smaller than the sum of its proper divisors (124870526).

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

66143232 is a wasteful number, since it uses less digits than its factorization.

66143232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7203 (or 7182 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 66143232 is about 8132.8489473247. The cubic root of 66143232 is about 404.4161316931.

Adding to 66143232 its reverse (23234166), we get a palindrome (89377398).

The spelling of 66143232 in words is "sixty-six million, one hundred forty-three thousand, two hundred thirty-two".