16690568 has 8 divisors (see below), whose sum is σ = 31294830. Its totient is φ = 8345280.

The previous prime is 16690561. The next prime is 16690577. The reversal of 16690568 is 86509661.

It can be written as a sum of positive squares in only one way, i.e., 11035684 + 5654884 = 3322^2 + 2378^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16690561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043153 + ... + 1043168.

Almost surely, 2^16690568 is an apocalyptic number.

It is an amenable number.

16690568 is a deficient number, since it is larger than the sum of its proper divisors (14604262).

16690568 is a wasteful number, since it uses less digits than its factorization.

16690568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086327 (or 2086323 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 16690568 is about 4085.4091594356. The cubic root of 16690568 is about 255.5585245892.

The spelling of 16690568 in words is "sixteen million, six hundred ninety thousand, five hundred sixty-eight".