27660105500 has 24 divisors (see below), whose sum is σ = 60409671504. Its totient is φ = 11064042000.

The previous prime is 27660105271. The next prime is 27660105511. The reversal of 27660105500 is 550106672.

It is a happy number.

It is a super-2 number, since 2×27660105500² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 27659606 + ... + 27660605.

It is an arithmetic number, because the mean of its divisors is an integer number (2517069646).

Almost surely, 2^27660105500 is an apocalyptic number.

27660105500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27660105500 is an abundant number, since it is smaller than the sum of its proper divisors (32749566004).

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

27660105500 is a wasteful number, since it uses less digits than its factorization.

27660105500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55320230 (or 55320218 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 27660105500 in words is "twenty-seven billion, six hundred sixty million, one hundred five thousand, five hundred".