66143330432 has 32 divisors (see below), whose sum is σ = 133250499900. Its totient is φ = 32700067840.

The previous prime is 66143330417. The next prime is 66143330453. The reversal of 66143330432 is 23403334166.

It can be written as a sum of positive squares in 2 ways, for example, as 61635013696 + 4508316736 = 248264^2 + 67144^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 66143330392 and 66143330401.

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, 2891669 + ... + 2914452.

Almost surely, 2^66143330432 is an apocalyptic number.

It is an amenable number.

66143330432 is an abundant number, since it is smaller than the sum of its proper divisors (67107169468).

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

66143330432 is an equidigital number, since it uses as much as digits as its factorization.

66143330432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5806224 (or 5806212 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 35.

Adding to 66143330432 its reverse (23403334166), we get a palindrome (89546664598).

The spelling of 66143330432 in words is "sixty-six billion, one hundred forty-three million, three hundred thirty thousand, four hundred thirty-two".