16162556557066 has 4 divisors (see below), whose sum is σ = 24243834835602. Its totient is φ = 8081278278532.

The previous prime is 16162556557019. The next prime is 16162556557109. The reversal of 16162556557066 is 66075565526161.

16162556557066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12129749562841 + 4032806994225 = 3482779^2 + 2008185^2 .

It is a super-3 number, since 3×16162556557066³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 16162556556995 and 16162556557013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4040639139265 + ... + 4040639139268.

Almost surely, 2^{16162556557066} is an apocalyptic number.

16162556557066 is a deficient number, since it is larger than the sum of its proper divisors (8081278278536).

16162556557066 is an equidigital number, since it uses as much as digits as its factorization.

16162556557066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081278278535.

The product of its (nonzero) digits is 68040000, while the sum is 61.

The spelling of 16162556557066 in words is "sixteen trillion, one hundred sixty-two billion, five hundred fifty-six million, five hundred fifty-seven thousand, sixty-six".