16866697829 has 2 divisors, whose sum is σ = 16866697830. Its totient is φ = 16866697828.

The previous prime is 16866697811. The next prime is 16866697949. The reversal of 16866697829 is 92879666861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11968797604 + 4897900225 = 109402^2 + 69985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16866697829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16866697129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8433348914 + 8433348915.

It is an arithmetic number, because the mean of its divisors is an integer number (8433348915).

Almost surely, 2^16866697829 is an apocalyptic number.

It is an amenable number.

16866697829 is a deficient number, since it is larger than the sum of its proper divisors (1).

16866697829 is an equidigital number, since it uses as much as digits as its factorization.

16866697829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94058496, while the sum is 68.

The spelling of 16866697829 in words is "sixteen billion, eight hundred sixty-six million, six hundred ninety-seven thousand, eight hundred twenty-nine".