16988776667 has 4 divisors (see below), whose sum is σ = 17053373040. Its totient is φ = 16924180296.

The previous prime is 16988776657. The next prime is 16988776681. The reversal of 16988776667 is 76667788961.

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

It is a cyclic number.

It is not a de Polignac number, because 16988776667 - 2³⁰ = 15915034843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16988776667.

It is not an unprimeable number, because it can be changed into a prime (16988776657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32297792 + ... + 32298317.

It is an arithmetic number, because the mean of its divisors is an integer number (4263343260).

Almost surely, 2^16988776667 is an apocalyptic number.

16988776667 is a deficient number, since it is larger than the sum of its proper divisors (64596373).

16988776667 is an equidigital number, since it uses as much as digits as its factorization.

16988776667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64596372.

The product of its digits is 256048128, while the sum is 71.

The spelling of 16988776667 in words is "sixteen billion, nine hundred eighty-eight million, seven hundred seventy-six thousand, six hundred sixty-seven".