11969966071 has 4 divisors (see below), whose sum is σ = 13679961232. Its totient is φ = 10259970912.

The previous prime is 11969966059. The next prime is 11969966093. The reversal of 11969966071 is 17066996911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17066996911 = 19699 ⋅866389.

It is a cyclic number.

It is not a de Polignac number, because 11969966071 - 2¹¹ = 11969964023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11969966471) 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 3 ways as a sum of consecutive naturals, for example, 854997570 + ... + 854997583.

It is an arithmetic number, because the mean of its divisors is an integer number (3419990308).

Almost surely, 2^11969966071 is an apocalyptic number.

11969966071 is a deficient number, since it is larger than the sum of its proper divisors (1709995161).

11969966071 is an equidigital number, since it uses as much as digits as its factorization.

11969966071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709995160.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 11969966071 in words is "eleven billion, nine hundred sixty-nine million, nine hundred sixty-six thousand, seventy-one".