16663361 has 16 divisors (see below), whose sum is σ = 20610240. Its totient is φ = 13245120.

The previous prime is 16663351. The next prime is 16663393. The reversal of 16663361 is 16336661.

16663361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16663361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16663301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (1288140).

Almost surely, 2^16663361 is an apocalyptic number.

16663361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16663361 is a deficient number, since it is larger than the sum of its proper divisors (3946879).

16663361 is a wasteful number, since it uses less digits than its factorization.

16663361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6176.

The product of its digits is 11664, while the sum is 32.

The square root of 16663361 is about 4082.0780247320. The cubic root of 16663361 is about 255.4195885909.

The spelling of 16663361 in words is "sixteen million, six hundred sixty-three thousand, three hundred sixty-one".