16663299 has 4 divisors (see below), whose sum is σ = 22217736. Its totient is φ = 11108864.

The previous prime is 16663291. The next prime is 16663301. The reversal of 16663299 is 99236661.

16663299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16663299 - 2³ = 16663291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16663299.

It is not an unprimeable number, because it can be changed into a prime (16663291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777214 + ... + 2777219.

It is an arithmetic number, because the mean of its divisors is an integer number (5554434).

Almost surely, 2^16663299 is an apocalyptic number.

16663299 is a deficient number, since it is larger than the sum of its proper divisors (5554437).

16663299 is an equidigital number, since it uses as much as digits as its factorization.

16663299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554436.

The product of its digits is 104976, while the sum is 42.

The square root of 16663299 is about 4082.0704305536. The cubic root of 16663299 is about 255.4192718074.

The spelling of 16663299 in words is "sixteen million, six hundred sixty-three thousand, two hundred ninety-nine".