16338267665 has 4 divisors (see below), whose sum is σ = 19605921204. Its totient is φ = 13070614128.

The previous prime is 16338267661. The next prime is 16338267677. The reversal of 16338267665 is 56676283361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11227733521 + 5110534144 = 105961^2 + 71488^2 .

It is a cyclic number.

It is not a de Polignac number, because 16338267665 - 2² = 16338267661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16338267661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1633826762 + ... + 1633826771.

It is an arithmetic number, because the mean of its divisors is an integer number (4901480301).

Almost surely, 2^16338267665 is an apocalyptic number.

It is an amenable number.

16338267665 is a deficient number, since it is larger than the sum of its proper divisors (3267653539).

16338267665 is an equidigital number, since it uses as much as digits as its factorization.

16338267665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267653538.

The product of its digits is 6531840, while the sum is 53.

The spelling of 16338267665 in words is "sixteen billion, three hundred thirty-eight million, two hundred sixty-seven thousand, six hundred sixty-five".