16697768 has 8 divisors (see below), whose sum is σ = 31308330. Its totient is φ = 8348880.

The previous prime is 16697749. The next prime is 16697771. The reversal of 16697768 is 86779661.

It can be written as a sum of positive squares in only one way, i.e., 16176484 + 521284 = 4022^2 + 722^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043603 + ... + 1043618.

Almost surely, 2^16697768 is an apocalyptic number.

It is an amenable number.

16697768 is a deficient number, since it is larger than the sum of its proper divisors (14610562).

16697768 is a wasteful number, since it uses less digits than its factorization.

16697768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087227 (or 2087223 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 16697768 is about 4086.2902491135. The cubic root of 16697768 is about 255.5952670347.

The spelling of 16697768 in words is "sixteen million, six hundred ninety-seven thousand, seven hundred sixty-eight".