16676417345581 has 12 divisors (see below), whose sum is σ = 19923397669308. Its totient is φ = 13907745738432.

The previous prime is 16676417345573. The next prime is 16676417345603. The reversal of 16676417345581 is 18554371467661.

It can be written as a sum of positive squares in 2 ways, for example, as 13989657075625 + 2686760269956 = 3740275^2 + 1639134^2 .

It is not a de Polignac number, because 16676417345581 - 2³ = 16676417345573 is a prime.

It is a super-2 number, since 2×16676417345581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16676417345531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4599120456 + ... + 4599124081.

It is an arithmetic number, because the mean of its divisors is an integer number (1660283139109).

Almost surely, 2^{16676417345581} is an apocalyptic number.

It is an amenable number.

16676417345581 is a deficient number, since it is larger than the sum of its proper divisors (3246980323727).

16676417345581 is an equidigital number, since it uses as much as digits as its factorization.

16676417345581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9198244588 (or 9198244581 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 64.

The spelling of 16676417345581 in words is "sixteen trillion, six hundred seventy-six billion, four hundred seventeen million, three hundred forty-five thousand, five hundred eighty-one".