66570325208 has 8 divisors (see below), whose sum is σ = 124819359780. Its totient is φ = 33285162600.

The previous prime is 66570325201. The next prime is 66570325219. The reversal of 66570325208 is 80252307566.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66570325201) 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, 4160645318 + ... + 4160645333.

Almost surely, 2^66570325208 is an apocalyptic number.

It is an amenable number.

66570325208 is a deficient number, since it is larger than the sum of its proper divisors (58249034572).

66570325208 is a wasteful number, since it uses less digits than its factorization.

66570325208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321290657 (or 8321290653 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 66570325208 in words is "sixty-six billion, five hundred seventy million, three hundred twenty-five thousand, two hundred eight".