16066321 has 2 divisors, whose sum is σ = 16066322. Its totient is φ = 16066320.

The previous prime is 16066313. The next prime is 16066357. The reversal of 16066321 is 12366061.

16066321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 3385600 = 3561^2 + 1840^2 .

It is an emirp because it is prime and its reverse (12366061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16066321 - 2³ = 16066313 is a prime.

It is not a weakly prime, because it can be changed into another prime (16066361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8033160 + 8033161.

It is an arithmetic number, because the mean of its divisors is an integer number (8033161).

Almost surely, 2^16066321 is an apocalyptic number.

It is an amenable number.

16066321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16066321 is an equidigital number, since it uses as much as digits as its factorization.

16066321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 16066321 is about 4008.2815519871. The cubic root of 16066321 is about 252.3318934638.

The spelling of 16066321 in words is "sixteen million, sixty-six thousand, three hundred twenty-one".