16684799399 has 2 divisors, whose sum is σ = 16684799400. Its totient is φ = 16684799398.

The previous prime is 16684799393. The next prime is 16684799437. The reversal of 16684799399 is 99399748661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16684799399 is a prime.

It is a super-2 number, since 2×16684799399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16684799393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342399699 + 8342399700.

It is an arithmetic number, because the mean of its divisors is an integer number (8342399700).

Almost surely, 2^16684799399 is an apocalyptic number.

16684799399 is a deficient number, since it is larger than the sum of its proper divisors (1).

16684799399 is an equidigital number, since it uses as much as digits as its factorization.

16684799399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158723712, while the sum is 71.

The spelling of 16684799399 in words is "sixteen billion, six hundred eighty-four million, seven hundred ninety-nine thousand, three hundred ninety-nine".