166656505560 has 64 divisors (see below), whose sum is σ = 513482220000. Its totient is φ = 43240605696.

The previous prime is 166656505507. The next prime is 166656505583. The reversal of 166656505560 is 65505656661.

It is a congruent number.

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, 18763185 + ... + 18772064.

Almost surely, 2^166656505560 is an apocalyptic number.

166656505560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166656505560 is an abundant number, since it is smaller than the sum of its proper divisors (346825714440).

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

166656505560 is a wasteful number, since it uses less digits than its factorization.

166656505560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37535300 (or 37535296 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 166656505560 in words is "one hundred sixty-six billion, six hundred fifty-six million, five hundred five thousand, five hundred sixty".