16676676685 has 4 divisors (see below), whose sum is σ = 20012012028. Its totient is φ = 13341341344.

The previous prime is 16676676659. The next prime is 16676676701. The reversal of 16676676685 is 58667667661.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2387104164 + 14289572521 = 48858^2 + 119539^2 .

It is a cyclic number.

It is not a de Polignac number, because 16676676685 - 2¹³ = 16676668493 is a prime.

It is a super-2 number, since 2×16676676685² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1667667664 + ... + 1667667673.

It is an arithmetic number, because the mean of its divisors is an integer number (5003003007).

Almost surely, 2^16676676685 is an apocalyptic number.

It is an amenable number.

16676676685 is a deficient number, since it is larger than the sum of its proper divisors (3335335343).

16676676685 is an equidigital number, since it uses as much as digits as its factorization.

16676676685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335335342.

The product of its digits is 91445760, while the sum is 64.

The spelling of 16676676685 in words is "sixteen billion, six hundred seventy-six million, six hundred seventy-six thousand, six hundred eighty-five".