27385666371 has 24 divisors (see below), whose sum is σ = 45220148064. Its totient is φ = 15644776320.

The previous prime is 27385666361. The next prime is 27385666433. The reversal of 27385666371 is 17366658372.

It is not a de Polignac number, because 27385666371 - 2⁶ = 27385666307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27385666331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188191 + ... + 300311.

It is an arithmetic number, because the mean of its divisors is an integer number (1884172836).

Almost surely, 2^27385666371 is an apocalyptic number.

27385666371 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27385666371 is a deficient number, since it is larger than the sum of its proper divisors (17834481693).

27385666371 is a wasteful number, since it uses less digits than its factorization.

27385666371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116011 (or 116008 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The spelling of 27385666371 in words is "twenty-seven billion, three hundred eighty-five million, six hundred sixty-six thousand, three hundred seventy-one".