16699883521 has 4 divisors (see below), whose sum is σ = 16702631344. Its totient is φ = 16697135700.

The previous prime is 16699883491. The next prime is 16699883561. The reversal of 16699883521 is 12538899661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16699883521 - 2⁷ = 16699883393 is a prime.

It is a super-2 number, since 2×16699883521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16699883561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364775 + ... + 1376956.

It is an arithmetic number, because the mean of its divisors is an integer number (4175657836).

It is a Proth number, since it is equal to 63705 ⋅ 2¹⁸ + 1 and 63705 < 2¹⁸.

Almost surely, 2^16699883521 is an apocalyptic number.

It is an amenable number.

16699883521 is a deficient number, since it is larger than the sum of its proper divisors (2747823).

16699883521 is an equidigital number, since it uses as much as digits as its factorization.

16699883521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747822.

The product of its digits is 5598720, while the sum is 58.

The spelling of 16699883521 in words is "sixteen billion, six hundred ninety-nine million, eight hundred eighty-three thousand, five hundred twenty-one".