16866059281 has 2 divisors, whose sum is σ = 16866059282. Its totient is φ = 16866059280.

The previous prime is 16866059267. The next prime is 16866059323. The reversal of 16866059281 is 18295066861.

16866059281 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., 16548506881 + 317552400 = 128641^2 + 17820^2 .

It is a cyclic number.

It is not a de Polignac number, because 16866059281 - 2¹¹ = 16866057233 is a prime.

It is a super-2 number, since 2×16866059281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16866059681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8433029640 + 8433029641.

It is an arithmetic number, because the mean of its divisors is an integer number (8433029641).

Almost surely, 2^16866059281 is an apocalyptic number.

It is an amenable number.

16866059281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16866059281 is an equidigital number, since it uses as much as digits as its factorization.

16866059281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 16866059281 in words is "sixteen billion, eight hundred sixty-six million, fifty-nine thousand, two hundred eighty-one".