27660013938 has 24 divisors (see below), whose sum is σ = 59959909776. Its totient is φ = 9215407800.

The previous prime is 27660013861. The next prime is 27660013939. The reversal of 27660013938 is 83931006672.

27660013938 is a `hidden beast` number, since 2 + 7 + 6 + 600 + 1 + 3 + 9 + 38 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27660013893 and 27660013902.

It is not an unprimeable number, because it can be changed into a prime (27660013939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345868 + ... + 418263.

It is an arithmetic number, because the mean of its divisors is an integer number (2498329574).

Almost surely, 2^27660013938 is an apocalyptic number.

27660013938 is an abundant number, since it is smaller than the sum of its proper divisors (32299895838).

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

27660013938 is a wasteful number, since it uses less digits than its factorization.

27660013938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766150 (or 766147 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 27660013938 in words is "twenty-seven billion, six hundred sixty million, thirteen thousand, nine hundred thirty-eight".