27996866617 has 8 divisors (see below), whose sum is σ = 28747817280. Its totient is φ = 27255130320.

The previous prime is 27996866593. The next prime is 27996866621. The reversal of 27996866617 is 71666869972.

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 27996866617 - 2¹⁹ = 27996342329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27996866657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2297434 + ... + 2309587.

It is an arithmetic number, because the mean of its divisors is an integer number (3593477160).

Almost surely, 2^27996866617 is an apocalyptic number.

It is an amenable number.

27996866617 is a deficient number, since it is larger than the sum of its proper divisors (750950663).

27996866617 is a wasteful number, since it uses less digits than its factorization.

27996866617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607183.

The product of its digits is 82301184, while the sum is 67.

The spelling of 27996866617 in words is "twenty-seven billion, nine hundred ninety-six million, eight hundred sixty-six thousand, six hundred seventeen".