16580617 has 4 divisors (see below), whose sum is σ = 16589716. Its totient is φ = 16571520.

The previous prime is 16580609. The next prime is 16580621. The reversal of 16580617 is 71608561.

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: 71608561 = 881 ⋅81281.

It can be written as a sum of positive squares in 2 ways, for example, as 7706176 + 8874441 = 2776^2 + 2979^2 .

It is a cyclic number.

It is not a de Polignac number, because 16580617 - 2³ = 16580609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16580647) 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, 768 + ... + 5809.

It is an arithmetic number, because the mean of its divisors is an integer number (4147429).

Almost surely, 2^16580617 is an apocalyptic number.

It is an amenable number.

16580617 is a deficient number, since it is larger than the sum of its proper divisors (9099).

16580617 is an equidigital number, since it uses as much as digits as its factorization.

16580617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9098.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 16580617 is about 4071.9303775973. The cubic root of 16580617 is about 254.9961142558.

The spelling of 16580617 in words is "sixteen million, five hundred eighty thousand, six hundred seventeen".