11706777661 has 8 divisors (see below), whose sum is σ = 11857104000. Its totient is φ = 11556504960.

The previous prime is 11706777653. The next prime is 11706777697. The reversal of 11706777661 is 16677760711.

11706777661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11706777661 - 2³ = 11706777653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11706777611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609990 + ... + 628888.

It is an arithmetic number, because the mean of its divisors is an integer number (1482138000).

Almost surely, 2^11706777661 is an apocalyptic number.

It is an amenable number.

11706777661 is a deficient number, since it is larger than the sum of its proper divisors (150326339).

11706777661 is an equidigital number, since it uses as much as digits as its factorization.

11706777661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26819.

The product of its (nonzero) digits is 518616, while the sum is 49.

The spelling of 11706777661 in words is "eleven billion, seven hundred six million, seven hundred seventy-seven thousand, six hundred sixty-one".