16565166556606 has 4 divisors (see below), whose sum is σ = 24847749834912. Its totient is φ = 8282583278302.

The previous prime is 16565166556571. The next prime is 16565166556649. The reversal of 16565166556606 is 60665566156561.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 4141291639150 + ... + 4141291639153.

It is an arithmetic number, because the mean of its divisors is an integer number (6211937458728).

Almost surely, 2^{16565166556606} is an apocalyptic number.

16565166556606 is a deficient number, since it is larger than the sum of its proper divisors (8282583278306).

16565166556606 is an equidigital number, since it uses as much as digits as its factorization.

16565166556606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8282583278305.

The product of its (nonzero) digits is 174960000, while the sum is 64.

The spelling of 16565166556606 in words is "sixteen trillion, five hundred sixty-five billion, one hundred sixty-six million, five hundred fifty-six thousand, six hundred six".