16628065 has 8 divisors (see below), whose sum is σ = 20012328. Its totient is φ = 13263360.

The previous prime is 16628039. The next prime is 16628069. The reversal of 16628065 is 56082661.

It can be written as a sum of positive squares in 4 ways, for example, as 564001 + 16064064 = 751^2 + 4008^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16628065 - 2¹³ = 16619873 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16628065.

It is not an unprimeable number, because it can be changed into a prime (16628069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2946 + ... + 6475.

It is an arithmetic number, because the mean of its divisors is an integer number (2501541).

Almost surely, 2^16628065 is an apocalyptic number.

It is an amenable number.

16628065 is a deficient number, since it is larger than the sum of its proper divisors (3384263).

16628065 is an equidigital number, since it uses as much as digits as its factorization.

16628065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9779.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 16628065 is about 4077.7524446685. The cubic root of 16628065 is about 255.2391195440.

The spelling of 16628065 in words is "sixteen million, six hundred twenty-eight thousand, sixty-five".