66797895824 has 40 divisors (see below), whose sum is σ = 141508234560. Its totient is φ = 30293481600.

The previous prime is 66797895817. The next prime is 66797895839. The reversal of 66797895824 is 42859879766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355007 + ... + 509534.

It is an arithmetic number, because the mean of its divisors is an integer number (3537705864).

Almost surely, 2^66797895824 is an apocalyptic number.

It is an amenable number.

66797895824 is an abundant number, since it is smaller than the sum of its proper divisors (74710338736).

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

66797895824 is a wasteful number, since it uses less digits than its factorization.

66797895824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864999 (or 864993 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 71.

The spelling of 66797895824 in words is "sixty-six billion, seven hundred ninety-seven million, eight hundred ninety-five thousand, eight hundred twenty-four".