66013947392 has 40 divisors (see below), whose sum is σ = 139657742136. Its totient is φ = 31065382912.

The previous prime is 66013947331. The next prime is 66013947413. The reversal of 66013947392 is 29374931066.

It is a self number, because there is not a number n which added to its sum of digits gives 66013947392.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3783458 + ... + 3800865.

Almost surely, 2^66013947392 is an apocalyptic number.

It is an amenable number.

66013947392 is an abundant number, since it is smaller than the sum of its proper divisors (73643794744).

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

66013947392 is an equidigital number, since it uses as much as digits as its factorization.

66013947392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584358 (or 7584342 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 66013947392 in words is "sixty-six billion, thirteen million, nine hundred forty-seven thousand, three hundred ninety-two".