16697668 has 12 divisors (see below), whose sum is σ = 31468780. Its totient is φ = 7706592.

The previous prime is 16697663. The next prime is 16697669. The reversal of 16697668 is 86679661.

It can be written as a sum of positive squares in 2 ways, for example, as 4293184 + 12404484 = 2072^2 + 3522^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16697663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160503 + ... + 160606.

Almost surely, 2^16697668 is an apocalyptic number.

It is an amenable number.

16697668 is a deficient number, since it is larger than the sum of its proper divisors (14771112).

16697668 is a wasteful number, since it uses less digits than its factorization.

16697668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321126 (or 321124 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 16697668 is about 4086.2780130578. The cubic root of 16697668 is about 255.5947567953.

The spelling of 16697668 in words is "sixteen million, six hundred ninety-seven thousand, six hundred sixty-eight".