16066565016065 has 8 divisors (see below), whose sum is σ = 19279905072360. Its totient is φ = 12853233977472.

The previous prime is 16066565016053. The next prime is 16066565016119. The reversal of 16066565016065 is 56061056566061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3243777500401 + 12822787515664 = 1801049^2 + 3580892^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16066565016065 - 2⁶ = 16066565016001 is a prime.

It is a super-2 number, since 2×16066565016065² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16066565015998 and 16066565016016.

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, 2625557 + ... + 6247133.

It is an arithmetic number, because the mean of its divisors is an integer number (2409988134045).

Almost surely, 2^{16066565016065} is an apocalyptic number.

It is an amenable number.

16066565016065 is a deficient number, since it is larger than the sum of its proper divisors (3213340056295).

16066565016065 is an equidigital number, since it uses as much as digits as its factorization.

16066565016065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508851.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 16066565016065 in words is "sixteen trillion, sixty-six billion, five hundred sixty-five million, sixteen thousand, sixty-five".