11777778966 has 8 divisors (see below), whose sum is σ = 23555557944. Its totient is φ = 3925926320.

The previous prime is 11777778949. The next prime is 11777778967. The reversal of 11777778966 is 66987777711.

It is a happy number.

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

11777778966 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 11777778897 and 11777778906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11777778967) 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, 981481575 + ... + 981481586.

It is an arithmetic number, because the mean of its divisors is an integer number (2944444743).

Almost surely, 2^11777778966 is an apocalyptic number.

11777778966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11777778966 is a wasteful number, since it uses less digits than its factorization.

11777778966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962963166.

The product of its digits is 43563744, while the sum is 66.

The spelling of 11777778966 in words is "eleven billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, nine hundred sixty-six".