16676567667565 has 8 divisors (see below), whose sum is σ = 21551256678168. Its totient is φ = 12315003816000.

The previous prime is 16676567667563. The next prime is 16676567667583. The reversal of 16676567667565 is 56576676567661.

It can be written as a sum of positive squares in 4 ways, for example, as 48547071556 + 16628020596009 = 220334^2 + 4077747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16676567667565 - 2¹ = 16676567667563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16676567667563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128281289686 + ... + 128281289815.

It is an arithmetic number, because the mean of its divisors is an integer number (2693907084771).

Almost surely, 2^{16676567667565} is an apocalyptic number.

It is an amenable number.

16676567667565 is a deficient number, since it is larger than the sum of its proper divisors (4874689010603).

16676567667565 is a wasteful number, since it uses less digits than its factorization.

16676567667565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256562579519.

The product of its digits is 12002256000, while the sum is 79.

The spelling of 16676567667565 in words is "sixteen trillion, six hundred seventy-six billion, five hundred sixty-seven million, six hundred sixty-seven thousand, five hundred sixty-five".