66566058204 has 24 divisors (see below), whose sum is σ = 155328526080. Its totient is φ = 22187582704.

The previous prime is 66566058199. The next prime is 66566058227. The reversal of 66566058204 is 40285066566.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 135067 + ... + 389069.

It is an arithmetic number, because the mean of its divisors is an integer number (6472021920).

Almost surely, 2^66566058204 is an apocalyptic number.

It is an amenable number.

66566058204 is an abundant number, since it is smaller than the sum of its proper divisors (88762467876).

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

66566058204 is a wasteful number, since it uses less digits than its factorization.

66566058204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275849 (or 275847 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 66566058204 in words is "sixty-six billion, five hundred sixty-six million, fifty-eight thousand, two hundred four".