16676443413621 has 24 divisors (see below), whose sum is σ = 24293292805080. Its totient is φ = 11023164688896.

The previous prime is 16676443413563. The next prime is 16676443413661. The reversal of 16676443413621 is 12631434467661.

16676443413621 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 6 + 4 + 4 + 3 + 4 + 1 + 3 + 621 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4491491830596 + 12184951583025 = 2119314^2 + 3490695^2 .

It is not a de Polignac number, because 16676443413621 - 2¹⁹ = 16676442889333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16676443413661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7135320 + ... + 9179633.

It is an arithmetic number, because the mean of its divisors is an integer number (1012220533545).

Almost surely, 2^{16676443413621} is an apocalyptic number.

It is an amenable number.

16676443413621 is a deficient number, since it is larger than the sum of its proper divisors (7616849391459).

16676443413621 is a wasteful number, since it uses less digits than its factorization.

16676443413621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16315925 (or 16315922 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 54.

The spelling of 16676443413621 in words is "sixteen trillion, six hundred seventy-six billion, four hundred forty-three million, four hundred thirteen thousand, six hundred twenty-one".