16566101 has 2 divisors, whose sum is σ = 16566102. Its totient is φ = 16566100.

The previous prime is 16566097. The next prime is 16566131. The reversal of 16566101 is 10166561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13322500 + 3243601 = 3650^2 + 1801^2 .

It is a cyclic number.

It is not a de Polignac number, because 16566101 - 2² = 16566097 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16566131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8283050 + 8283051.

It is an arithmetic number, because the mean of its divisors is an integer number (8283051).

Almost surely, 2^16566101 is an apocalyptic number.

It is an amenable number.

16566101 is a deficient number, since it is larger than the sum of its proper divisors (1).

16566101 is an equidigital number, since it uses as much as digits as its factorization.

16566101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 16566101 is about 4070.1475403233. The cubic root of 16566101 is about 254.9216778557.

It can be divided in two parts, 165 and 66101, that added together give a palindrome (66266).

The spelling of 16566101 in words is "sixteen million, five hundred sixty-six thousand, one hundred one".