27686297663 has 8 divisors (see below), whose sum is σ = 27846368688. Its totient is φ = 27526561344.

The previous prime is 27686297657. The next prime is 27686297669. The reversal of 27686297663 is 36679268672.

It is a happy number.

It is a Cunningham number, because it is equal to 166392²-1.

It is an interprime number because it is at equal distance from previous prime (27686297657) and next prime (27686297669).

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 27686297663 - 2²⁸ = 27417862207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27686297596 and 27686297605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27686297669) 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, 83195 + ... + 249587.

It is an arithmetic number, because the mean of its divisors is an integer number (3480796086).

Almost surely, 2^27686297663 is an apocalyptic number.

27686297663 is a deficient number, since it is larger than the sum of its proper divisors (160071025).

27686297663 is a wasteful number, since it uses less digits than its factorization.

27686297663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167353.

The product of its digits is 54867456, while the sum is 62.

The spelling of 27686297663 in words is "twenty-seven billion, six hundred eighty-six million, two hundred ninety-seven thousand, six hundred sixty-three".