16616869 has 4 divisors (see below), whose sum is σ = 16627660. Its totient is φ = 16606080.

The previous prime is 16616851. The next prime is 16616903. The reversal of 16616869 is 96861661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96861661 = 13 ⋅7450897.

It can be written as a sum of positive squares in 2 ways, for example, as 214369 + 16402500 = 463^2 + 4050^2 .

It is a cyclic number.

It is not a de Polignac number, because 16616869 - 2¹¹ = 16614821 is a prime.

It is a super-2 number, since 2×16616869² = 552240670726322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616839) 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, 2604 + ... + 6325.

It is an arithmetic number, because the mean of its divisors is an integer number (4156915).

Almost surely, 2^16616869 is an apocalyptic number.

It is an amenable number.

16616869 is a deficient number, since it is larger than the sum of its proper divisors (10791).

16616869 is an equidigital number, since it uses as much as digits as its factorization.

16616869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10790.

The product of its digits is 93312, while the sum is 43.

The square root of 16616869 is about 4076.3793984368. The cubic root of 16616869 is about 255.1818208586.

The spelling of 16616869 in words is "sixteen million, six hundred sixteen thousand, eight hundred sixty-nine".