16668099 has 48 divisors (see below), whose sum is σ = 29352960. Its totient is φ = 9253440.

The previous prime is 16668089. The next prime is 16668107. The reversal of 16668099 is 99086661.

It is not a de Polignac number, because 16668099 - 2⁷ = 16667971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16668079) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69622 + ... + 69860.

It is an arithmetic number, because the mean of its divisors is an integer number (611520).

Almost surely, 2^16668099 is an apocalyptic number.

16668099 is a deficient number, since it is larger than the sum of its proper divisors (12684861).

16668099 is an equidigital number, since it uses as much as digits as its factorization.

16668099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 16668099 is about 4082.6583251602. The cubic root of 16668099 is about 255.4437946585.

It can be divided in two parts, 166 and 68099, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 16668099 in words is "sixteen million, six hundred sixty-eight thousand, ninety-nine".