16748665 has 4 divisors (see below), whose sum is σ = 20098404. Its totient is φ = 13398928.

The previous prime is 16748663. The next prime is 16748681. The reversal of 16748665 is 56684761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56684761 = 7 ⋅8097823.

It can be written as a sum of positive squares in 2 ways, for example, as 7458361 + 9290304 = 2731^2 + 3048^2 .

It is a cyclic number.

It is not a de Polignac number, because 16748665 - 2¹ = 16748663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16748663) 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, 1674862 + ... + 1674871.

It is an arithmetic number, because the mean of its divisors is an integer number (5024601).

Almost surely, 2^16748665 is an apocalyptic number.

It is an amenable number.

16748665 is a deficient number, since it is larger than the sum of its proper divisors (3349739).

16748665 is an equidigital number, since it uses as much as digits as its factorization.

16748665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349738.

The product of its digits is 241920, while the sum is 43.

The square root of 16748665 is about 4092.5132864781. The cubic root of 16748665 is about 255.8546996506.

The spelling of 16748665 in words is "sixteen million, seven hundred forty-eight thousand, six hundred sixty-five".