16566533 has 8 divisors (see below), whose sum is σ = 16832088. Its totient is φ = 16303104.

The previous prime is 16566527. The next prime is 16566553. The reversal of 16566533 is 33566561.

16566533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4190209 + 12376324 = 2047^2 + 3518^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16566533 - 2¹⁰ = 16565509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16566493 and 16566502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22235 + ... + 22967.

It is an arithmetic number, because the mean of its divisors is an integer number (2104011).

Almost surely, 2^16566533 is an apocalyptic number.

It is an amenable number.

16566533 is a deficient number, since it is larger than the sum of its proper divisors (265555).

16566533 is an equidigital number, since it uses as much as digits as its factorization.

16566533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063.

The product of its digits is 48600, while the sum is 35.

The square root of 16566533 is about 4070.2006093066. The cubic root of 16566533 is about 254.9238937303.

The spelling of 16566533 in words is "sixteen million, five hundred sixty-six thousand, five hundred thirty-three".