16488665 has 4 divisors (see below), whose sum is σ = 19786404. Its totient is φ = 13190928.

The previous prime is 16488653. The next prime is 16488679. The reversal of 16488665 is 56688461.

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 8826841 + 7661824 = 2971^2 + 2768^2 .

It is a cyclic number.

It is not a de Polignac number, because 16488665 - 2¹⁰ = 16487641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648862 + ... + 1648871.

It is an arithmetic number, because the mean of its divisors is an integer number (4946601).

Almost surely, 2^16488665 is an apocalyptic number.

It is an amenable number.

16488665 is a deficient number, since it is larger than the sum of its proper divisors (3297739).

16488665 is an equidigital number, since it uses as much as digits as its factorization.

16488665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297738.

The product of its digits is 276480, while the sum is 44.

The square root of 16488665 is about 4060.6237205631. The cubic root of 16488665 is about 254.5238583835.

The spelling of 16488665 in words is "sixteen million, four hundred eighty-eight thousand, six hundred sixty-five".