66575218804 has 24 divisors (see below), whose sum is σ = 117086389056. Its totient is φ = 33122040000.

The previous prime is 66575218789. The next prime is 66575218837. The reversal of 66575218804 is 40881257566.

It is a happy number.

It is a congruent number.

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, 5523024 + ... + 5535064.

It is an arithmetic number, because the mean of its divisors is an integer number (4878599544).

Almost surely, 2^66575218804 is an apocalyptic number.

It is an amenable number.

66575218804 is a deficient number, since it is larger than the sum of its proper divisors (50511170252).

66575218804 is a wasteful number, since it uses less digits than its factorization.

66575218804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18807 (or 18805 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 66575218804 in words is "sixty-six billion, five hundred seventy-five million, two hundred eighteen thousand, eight hundred four".