6691771966 has 8 divisors (see below), whose sum is σ = 10950172344. Its totient is φ = 3041714520.

The previous prime is 6691771901. The next prime is 6691771967.

6691771966 is nontrivially palindromic in base 10.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6691771966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691771967) 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 3 ways as a sum of consecutive naturals, for example, 152085705 + ... + 152085748.

It is an arithmetic number, because the mean of its divisors is an integer number (1368771543).

Almost surely, 2^6691771966 is an apocalyptic number.

6691771966 is a deficient number, since it is larger than the sum of its proper divisors (4258400378).

6691771966 is a wasteful number, since it uses less digits than its factorization.

6691771966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304171466.

The product of its digits is 5143824, while the sum is 58.

The square root of 6691771966 is about 81803.2515612919. The cubic root of 6691771966 is about 1884.4315975073.

The spelling of 6691771966 in words is "six billion, six hundred ninety-one million, seven hundred seventy-one thousand, nine hundred sixty-six".