66324437632 has 16 divisors (see below), whose sum is σ = 132130715850. Its totient is φ = 33162218752.

The previous prime is 66324437629. The next prime is 66324437723. The reversal of 66324437632 is 23673442366.

66324437632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 62888602176 + 3435835456 = 250776^2 + 58616^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259079707 + ... + 259079962.

Almost surely, 2^66324437632 is an apocalyptic number.

It is an amenable number.

66324437632 is a deficient number, since it is larger than the sum of its proper divisors (65806278218).

66324437632 is an equidigital number, since it uses as much as digits as its factorization.

66324437632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518159683 (or 518159671 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 46.

Adding to 66324437632 its reverse (23673442366), we get a palindrome (89997879998).

The spelling of 66324437632 in words is "sixty-six billion, three hundred twenty-four million, four hundred thirty-seven thousand, six hundred thirty-two".