16665566510606 has 16 divisors (see below), whose sum is σ = 27577916816688. Its totient is φ = 7504195051200.

The previous prime is 16665566510603. The next prime is 16665566510699. The reversal of 16665566510606 is 60601566556661.

It is a happy number.

16665566510606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16665566510606² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665566510603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7816868780 + ... + 7816870911.

It is an arithmetic number, because the mean of its divisors is an integer number (1723619801043).

Almost surely, 2^{16665566510606} is an apocalyptic number.

16665566510606 is a deficient number, since it is larger than the sum of its proper divisors (10912350306082).

16665566510606 is a wasteful number, since it uses less digits than its factorization.

16665566510606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15633739747.

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 16665566510606 in words is "sixteen trillion, six hundred sixty-five billion, five hundred sixty-six million, five hundred ten thousand, six hundred six".