27708385866 has 64 divisors (see below), whose sum is σ = 64387596288. Its totient is φ = 7785315648.

The previous prime is 27708385801. The next prime is 27708385877. The reversal of 27708385866 is 66858380772.

It is a super-3 number, since 3×27708385866³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1716951 + ... + 1733013.

It is an arithmetic number, because the mean of its divisors is an integer number (1006056192).

Almost surely, 2^27708385866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27708385866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32193798144).

27708385866 is an abundant number, since it is smaller than the sum of its proper divisors (36679210422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27708385866 is a wasteful number, since it uses less digits than its factorization.

27708385866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16755.

The product of its (nonzero) digits is 27095040, while the sum is 60.

The spelling of 27708385866 in words is "twenty-seven billion, seven hundred eight million, three hundred eighty-five thousand, eight hundred sixty-six".