16640075 has 6 divisors (see below), whose sum is σ = 20633724. Its totient is φ = 13312040.

The previous prime is 16640069. The next prime is 16640077. The reversal of 16640075 is 57004661.

It is not a de Polignac number, because 16640075 - 2¹⁶ = 16574539 is a prime.

It is a super-3 number, since 3×16640075³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16640077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 332777 + ... + 332826.

It is an arithmetic number, because the mean of its divisors is an integer number (3438954).

Almost surely, 2^16640075 is an apocalyptic number.

16640075 is a deficient number, since it is larger than the sum of its proper divisors (3993649).

16640075 is an equidigital number, since it uses as much as digits as its factorization.

16640075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665613 (or 665608 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 16640075 is about 4079.2248038077. The cubic root of 16640075 is about 255.3005555178.

The spelling of 16640075 in words is "sixteen million, six hundred forty thousand, seventy-five".