66715050768 has 80 divisors (see below), whose sum is σ = 180293817600. Its totient is φ = 21230218240.

The previous prime is 66715050749. The next prime is 66715050769. The reversal of 66715050768 is 86705051766.

It is a self number, because there is not a number n which added to its sum of digits gives 66715050768.

It is not an unprimeable number, because it can be changed into a prime (66715050769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145368 + ... + 393143.

It is an arithmetic number, because the mean of its divisors is an integer number (2253672720).

Almost surely, 2^66715050768 is an apocalyptic number.

It is an amenable number.

66715050768 is an abundant number, since it is smaller than the sum of its proper divisors (113578766832).

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

66715050768 is a wasteful number, since it uses less digits than its factorization.

66715050768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538640 (or 538634 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 66715050768 in words is "sixty-six billion, seven hundred fifteen million, fifty thousand, seven hundred sixty-eight".