16672565 has 16 divisors (see below), whose sum is σ = 24624768. Its totient is φ = 10552896.

The previous prime is 16672559. The next prime is 16672567. The reversal of 16672565 is 56527661.

It is a cyclic number.

It is not a de Polignac number, because 16672565 - 2⁴ = 16672549 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16672567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17867 + ... + 18776.

It is an arithmetic number, because the mean of its divisors is an integer number (1539048).

Almost surely, 2^16672565 is an apocalyptic number.

It is an amenable number.

16672565 is a deficient number, since it is larger than the sum of its proper divisors (7952203).

16672565 is a wasteful number, since it uses less digits than its factorization.

16672565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36668.

The product of its digits is 75600, while the sum is 38.

The square root of 16672565 is about 4083.2052360860. The cubic root of 16672565 is about 255.4666069003.

The spelling of 16672565 in words is "sixteen million, six hundred seventy-two thousand, five hundred sixty-five".