66072450632 has 16 divisors (see below), whose sum is σ = 123958873260. Its totient is φ = 33016751104.

The previous prime is 66072450607. The next prime is 66072450637. The reversal of 66072450632 is 23605427066.

It can be written as a sum of positive squares in 2 ways, for example, as 65318069476 + 754381156 = 255574^2 + 27466^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66072450632.

It is not an unprimeable number, because it can be changed into a prime (66072450637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2419853 + ... + 2447004.

Almost surely, 2^66072450632 is an apocalyptic number.

It is an amenable number.

66072450632 is a deficient number, since it is larger than the sum of its proper divisors (57886422628).

66072450632 is a wasteful number, since it uses less digits than its factorization.

66072450632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868560 (or 4868556 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

Adding to 66072450632 its reverse (23605427066), we get a palindrome (89677877698).

The spelling of 66072450632 in words is "sixty-six billion, seventy-two million, four hundred fifty thousand, six hundred thirty-two".