66764317708 has 48 divisors (see below), whose sum is σ = 136107740160. Its totient is φ = 28355745600.

The previous prime is 66764317691. The next prime is 66764317723. The reversal of 66764317708 is 80771346766.

66764317708 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 804366 + ... + 883477.

It is an arithmetic number, because the mean of its divisors is an integer number (2835577920).

Almost surely, 2^66764317708 is an apocalyptic number.

It is an amenable number.

66764317708 is an abundant number, since it is smaller than the sum of its proper divisors (69343422452).

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

66764317708 is a wasteful number, since it uses less digits than its factorization.

66764317708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687918 (or 1687916 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 55.

The spelling of 66764317708 in words is "sixty-six billion, seven hundred sixty-four million, three hundred seventeen thousand, seven hundred eight".