16073688665 has 8 divisors (see below), whose sum is σ = 19292075208. Its totient is φ = 12856518400.

The previous prime is 16073688637. The next prime is 16073688671. The reversal of 16073688665 is 56688637061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12060212761 + 4013475904 = 109819^2 + 63352^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16073688665 - 2⁶ = 16073688601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16073688665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274736 + ... + 328065.

It is an arithmetic number, because the mean of its divisors is an integer number (2411509401).

Almost surely, 2^16073688665 is an apocalyptic number.

It is an amenable number.

16073688665 is a deficient number, since it is larger than the sum of its proper divisors (3218386543).

16073688665 is an equidigital number, since it uses as much as digits as its factorization.

16073688665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608139.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 16073688665 in words is "sixteen billion, seventy-three million, six hundred eighty-eight thousand, six hundred sixty-five".