16668375 has 16 divisors (see below), whose sum is σ = 27736800. Its totient is φ = 8889600.

The previous prime is 16668361. The next prime is 16668401. The reversal of 16668375 is 57386661.

It is not a de Polignac number, because 16668375 - 2⁵ = 16668343 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21850 + ... + 22599.

It is an arithmetic number, because the mean of its divisors is an integer number (1733550).

Almost surely, 2^16668375 is an apocalyptic number.

16668375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16668375 is a deficient number, since it is larger than the sum of its proper divisors (11068425).

16668375 is an equidigital number, since it uses as much as digits as its factorization.

16668375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44467 (or 44457 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 16668375 is about 4082.6921265263. The cubic root of 16668375 is about 255.4452045793.

The spelling of 16668375 in words is "sixteen million, six hundred sixty-eight thousand, three hundred seventy-five".