165600566566 has 32 divisors (see below), whose sum is σ = 267575892480. Its totient is φ = 76584681600.

The previous prime is 165600566557. The next prime is 165600566597. The reversal of 165600566566 is 665665006561.

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, 640465 + ... + 861043.

It is an arithmetic number, because the mean of its divisors is an integer number (8361746640).

Almost surely, 2^165600566566 is an apocalyptic number.

165600566566 is a deficient number, since it is larger than the sum of its proper divisors (101975325914).

165600566566 is a wasteful number, since it uses less digits than its factorization.

165600566566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220980.

The product of its (nonzero) digits is 5832000, while the sum is 52.

The spelling of 165600566566 in words is "one hundred sixty-five billion, six hundred million, five hundred sixty-six thousand, five hundred sixty-six".