6601166717 has 4 divisors (see below), whose sum is σ = 6619867260. Its totient is φ = 6582466176.

The previous prime is 6601166711. The next prime is 6601166777. The reversal of 6601166717 is 7176611066.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2071069081 + 4530097636 = 45509^2 + 67306^2 .

It is a cyclic number.

It is not a de Polignac number, because 6601166717 - 2⁸ = 6601166461 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 (6601166711) 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, 9349742 + ... + 9350447.

It is an arithmetic number, because the mean of its divisors is an integer number (1654966815).

Almost surely, 2^6601166717 is an apocalyptic number.

It is an amenable number.

6601166717 is a deficient number, since it is larger than the sum of its proper divisors (18700543).

6601166717 is a wasteful number, since it uses less digits than its factorization.

6601166717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18700542.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 6601166717 is about 81247.5643758014. The cubic root of 6601166717 is about 1875.8879792306.

The spelling of 6601166717 in words is "six billion, six hundred one million, one hundred sixty-six thousand, seven hundred seventeen".