66799648848 has 80 divisors (see below), whose sum is σ = 186078715200. Its totient is φ = 20580111360.

The previous prime is 66799648841. The next prime is 66799648897. The reversal of 66799648848 is 84884699766.

It is a super-2 number, since 2×66799648848² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66799648848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66799648841) 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, 855843 + ... + 930626.

It is an arithmetic number, because the mean of its divisors is an integer number (2325983940).

Almost surely, 2^66799648848 is an apocalyptic number.

It is an amenable number.

66799648848 is an abundant number, since it is smaller than the sum of its proper divisors (119279066352).

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

66799648848 is a wasteful number, since it uses less digits than its factorization.

66799648848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786540 (or 1786534 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 75.

The spelling of 66799648848 in words is "sixty-six billion, seven hundred ninety-nine million, six hundred forty-eight thousand, eight hundred forty-eight".