66782832128 has 20 divisors (see below), whose sum is σ = 133435230060. Its totient is φ = 33391415808.

The previous prime is 66782832107. The next prime is 66782832139. The reversal of 66782832128 is 82123828766.

It is a self number, because there is not a number n which added to its sum of digits gives 66782832128.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65217098 + ... + 65218121.

It is an arithmetic number, because the mean of its divisors is an integer number (6671761503).

Almost surely, 2^66782832128 is an apocalyptic number.

It is an amenable number.

66782832128 is a deficient number, since it is larger than the sum of its proper divisors (66652397932).

66782832128 is an equidigital number, since it uses as much as digits as its factorization.

66782832128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130435237 (or 130435221 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 53.

The spelling of 66782832128 in words is "sixty-six billion, seven hundred eighty-two million, eight hundred thirty-two thousand, one hundred twenty-eight".