11771777766 has 16 divisors (see below), whose sum is σ = 26906920704. Its totient is φ = 3363365064.

The previous prime is 11771777737. The next prime is 11771777767. The reversal of 11771777766 is 66777717711.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11771777767) 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 7 ways as a sum of consecutive naturals, for example, 140140170 + ... + 140140253.

It is an arithmetic number, because the mean of its divisors is an integer number (1681682544).

Almost surely, 2^11771777766 is an apocalyptic number.

11771777766 is an abundant number, since it is smaller than the sum of its proper divisors (15135142938).

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

11771777766 is a wasteful number, since it uses less digits than its factorization.

11771777766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280280435.

The product of its digits is 4235364, while the sum is 57.

The spelling of 11771777766 in words is "eleven billion, seven hundred seventy-one million, seven hundred seventy-seven thousand, seven hundred sixty-six".