16663375 has 16 divisors (see below), whose sum is σ = 21003840. Its totient is φ = 13197600.

The previous prime is 16663351. The next prime is 16663393. The reversal of 16663375 is 57336661.

It is a de Polignac number, because none of the positive numbers 2^k-16663375 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13014 + ... + 14236.

It is an arithmetic number, because the mean of its divisors is an integer number (1312740).

Almost surely, 2^16663375 is an apocalyptic number.

16663375 is a deficient number, since it is larger than the sum of its proper divisors (4340465).

16663375 is a wasteful number, since it uses less digits than its factorization.

16663375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1337 counting only the distinct ones).

The product of its digits is 68040, while the sum is 37.

The square root of 16663375 is about 4082.0797395445. The cubic root of 16663375 is about 255.4196601226.

It can be divided in two parts, 1666 and 3375, that added together give a square (5041 = 71²).

The spelling of 16663375 in words is "sixteen million, six hundred sixty-three thousand, three hundred seventy-five".