27799666560 has 192 divisors, whose sum is σ = 99551677680. Its totient is φ = 7413202944.

The previous prime is 27799666541. The next prime is 27799666561. The reversal of 27799666560 is 6566699772.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27799666561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66144 + ... + 244896.

Almost surely, 2^27799666560 is an apocalyptic number.

27799666560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27799666560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49775838840).

27799666560 is an abundant number, since it is smaller than the sum of its proper divisors (71752011120).

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

27799666560 is an equidigital number, since it uses as much as digits as its factorization.

27799666560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178787 (or 178763 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 63.

The spelling of 27799666560 in words is "twenty-seven billion, seven hundred ninety-nine million, six hundred sixty-six thousand, five hundred sixty".