16616322133 has 4 divisors (see below), whose sum is σ = 16619695468. Its totient is φ = 16612948800.

The previous prime is 16616322131. The next prime is 16616322167. The reversal of 16616322133 is 33122361661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33122361661 = 5521 ⋅5999341.

It can be written as a sum of positive squares in 2 ways, for example, as 5252335729 + 11363986404 = 72473^2 + 106602^2 .

It is a cyclic number.

It is not a de Polignac number, because 16616322133 - 2¹ = 16616322131 is a prime.

It is a super-2 number, since 2×16616322133² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616322131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679268 + ... + 1689133.

It is an arithmetic number, because the mean of its divisors is an integer number (4154923867).

Almost surely, 2^16616322133 is an apocalyptic number.

It is an amenable number.

16616322133 is a deficient number, since it is larger than the sum of its proper divisors (3373335).

16616322133 is an equidigital number, since it uses as much as digits as its factorization.

16616322133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373334.

The product of its digits is 23328, while the sum is 34.

Adding to 16616322133 its reverse (33122361661), we get a palindrome (49738683794).

The spelling of 16616322133 in words is "sixteen billion, six hundred sixteen million, three hundred twenty-two thousand, one hundred thirty-three".