16640275 has 12 divisors (see below), whose sum is σ = 20795544. Its totient is φ = 13208000.

The previous prime is 16640249. The next prime is 16640317. The reversal of 16640275 is 57204661.

It is a happy number.

It is not a de Polignac number, because 16640275 - 2⁵ = 16640243 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 735 + ... + 5815.

It is an arithmetic number, because the mean of its divisors is an integer number (1732962).

Almost surely, 2^16640275 is an apocalyptic number.

16640275 is a deficient number, since it is larger than the sum of its proper divisors (4155269).

16640275 is a wasteful number, since it uses less digits than its factorization.

16640275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5222 (or 5217 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 16640275 is about 4079.2493181957. The cubic root of 16640275 is about 255.3015783478.

The spelling of 16640275 in words is "sixteen million, six hundred forty thousand, two hundred seventy-five".