66358560764 has 6 divisors (see below), whose sum is σ = 116127481344. Its totient is φ = 33179280380.

The previous prime is 66358560761. The next prime is 66358560773. The reversal of 66358560764 is 46706585366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66358560761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8294820092 + ... + 8294820099.

It is an arithmetic number, because the mean of its divisors is an integer number (19354580224).

Almost surely, 2^66358560764 is an apocalyptic number.

It is an amenable number.

66358560764 is a deficient number, since it is larger than the sum of its proper divisors (49768920580).

66358560764 is a wasteful number, since it uses less digits than its factorization.

66358560764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16589640195 (or 16589640193 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 66358560764 in words is "sixty-six billion, three hundred fifty-eight million, five hundred sixty thousand, seven hundred sixty-four".