27758443666775 has 12 divisors (see below), whose sum is σ = 34452850678512. Its totient is φ = 22185864267840.

The previous prime is 27758443666727. The next prime is 27758443666777. The reversal of 27758443666775 is 57766634485772.

It is not a de Polignac number, because 27758443666775 - 2⁴² = 23360397155671 is a prime.

It is a super-2 number, since 2×27758443666775² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27758443666696 and 27758443666705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27758443666777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522239534 + ... + 522292683.

It is an arithmetic number, because the mean of its divisors is an integer number (2871070889876).

Almost surely, 2^{27758443666775} is an apocalyptic number.

27758443666775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27758443666775 is a deficient number, since it is larger than the sum of its proper divisors (6694407011737).

27758443666775 is a wasteful number, since it uses less digits than its factorization.

27758443666775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044533290 (or 1044533285 counting only the distinct ones).

The product of its digits is 9957427200, while the sum is 77.

The spelling of 27758443666775 in words is "twenty-seven trillion, seven hundred fifty-eight billion, four hundred forty-three million, six hundred sixty-six thousand, seven hundred seventy-five".