11966211471 has 4 divisors (see below), whose sum is σ = 15954948632. Its totient is φ = 7977474312.

The previous prime is 11966211463. The next prime is 11966211473. The reversal of 11966211471 is 17411266911.

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

It is not a de Polignac number, because 11966211471 - 2³ = 11966211463 is a prime.

It is a super-3 number, since 3×11966211471³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11966211473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1994368576 + ... + 1994368581.

It is an arithmetic number, because the mean of its divisors is an integer number (3988737158).

Almost surely, 2^11966211471 is an apocalyptic number.

11966211471 is a deficient number, since it is larger than the sum of its proper divisors (3988737161).

11966211471 is an equidigital number, since it uses as much as digits as its factorization.

11966211471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988737160.

The product of its digits is 18144, while the sum is 39.

The spelling of 11966211471 in words is "eleven billion, nine hundred sixty-six million, two hundred eleven thousand, four hundred seventy-one".