16691166771 has 8 divisors (see below), whose sum is σ = 22377844944. Its totient is φ = 11065966560.

The previous prime is 16691166761. The next prime is 16691166773. The reversal of 16691166771 is 17766119661.

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

It is not a de Polignac number, because 16691166771 - 2¹³ = 16691158579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16691166773) 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, 15368856 + ... + 15369941.

It is an arithmetic number, because the mean of its divisors is an integer number (2797230618).

Almost surely, 2^16691166771 is an apocalyptic number.

16691166771 is a deficient number, since it is larger than the sum of its proper divisors (5686678173).

16691166771 is a wasteful number, since it uses less digits than its factorization.

16691166771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30738981.

The product of its digits is 571536, while the sum is 51.

The spelling of 16691166771 in words is "sixteen billion, six hundred ninety-one million, one hundred sixty-six thousand, seven hundred seventy-one".