16606565515655 has 12 divisors (see below), whose sum is σ = 20638742308392. Its totient is φ = 12827140257120.

The previous prime is 16606565515633. The next prime is 16606565515681. The reversal of 16606565515655 is 55651556560661.

It is not a de Polignac number, because 16606565515655 - 2¹⁸ = 16606565253511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1974617141 + ... + 1974625550.

It is an arithmetic number, because the mean of its divisors is an integer number (1719895192366).

Almost surely, 2^{16606565515655} is an apocalyptic number.

16606565515655 is a deficient number, since it is larger than the sum of its proper divisors (4032176792737).

16606565515655 is an equidigital number, since it uses as much as digits as its factorization.

16606565515655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949242754 (or 3949242725 counting only the distinct ones).

The product of its (nonzero) digits is 121500000, while the sum is 62.

The spelling of 16606565515655 in words is "sixteen trillion, six hundred six billion, five hundred sixty-five million, five hundred fifteen thousand, six hundred fifty-five".