66208795968 has 112 divisors (see below), whose sum is σ = 210739857920. Its totient is φ = 17921170944.

The previous prime is 66208795943. The next prime is 66208795981. The reversal of 66208795968 is 86959780266.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66208795899 and 66208795908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270846 + ... + 1321917.

Almost surely, 2^66208795968 is an apocalyptic number.

It is an amenable number.

66208795968 is an abundant number, since it is smaller than the sum of its proper divisors (144531061952).

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

66208795968 is a wasteful number, since it uses less digits than its factorization.

66208795968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592804 (or 2592794 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 66.

The spelling of 66208795968 in words is "sixty-six billion, two hundred eight million, seven hundred ninety-five thousand, nine hundred sixty-eight".