66487713832 has 16 divisors (see below), whose sum is σ = 124683346260. Its totient is φ = 33238821504.

The previous prime is 66487713793. The next prime is 66487713833. The reversal of 66487713832 is 23831778466.

It can be written as a sum of positive squares in 2 ways, for example, as 57718140516 + 8769573316 = 240246^2 + 93646^2 .

It is not an unprimeable number, because it can be changed into a prime (66487713833) 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, 573013 + ... + 679204.

Almost surely, 2^66487713832 is an apocalyptic number.

It is an amenable number.

66487713832 is a deficient number, since it is larger than the sum of its proper divisors (58195632428).

66487713832 is a wasteful number, since it uses less digits than its factorization.

66487713832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258860 (or 1258856 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The spelling of 66487713832 in words is "sixty-six billion, four hundred eighty-seven million, seven hundred thirteen thousand, eight hundred thirty-two".