16648685 has 4 divisors (see below), whose sum is σ = 19978428. Its totient is φ = 13318944.

The previous prime is 16648673. The next prime is 16648691. The reversal of 16648685 is 58684661.

16648685 is nontrivially palindromic in base 11.

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 9815689 + 6832996 = 3133^2 + 2614^2 .

It is a cyclic number.

It is not a de Polignac number, because 16648685 - 2²² = 12454381 is a prime.

It is a Duffinian number.

It is a congruent 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, 1664864 + ... + 1664873.

It is an arithmetic number, because the mean of its divisors is an integer number (4994607).

Almost surely, 2^16648685 is an apocalyptic number.

It is an amenable number.

16648685 is a deficient number, since it is larger than the sum of its proper divisors (3329743).

16648685 is an equidigital number, since it uses as much as digits as its factorization.

16648685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329742.

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

The square root of 16648685 is about 4080.2800149009. The cubic root of 16648685 is about 255.3445809357.

The spelling of 16648685 in words is "sixteen million, six hundred forty-eight thousand, six hundred eighty-five".