27666342 has 24 divisors (see below), whose sum is σ = 65393640. Its totient is φ = 8383680.

The previous prime is 27666311. The next prime is 27666391. The reversal of 27666342 is 24366672.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27666297 and 27666306.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 69667 + ... + 70062.

It is an arithmetic number, because the mean of its divisors is an integer number (2724735).

Almost surely, 2^27666342 is an apocalyptic number.

27666342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

27666342 is an abundant number, since it is smaller than the sum of its proper divisors (37727298).

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

27666342 is a wasteful number, since it uses less digits than its factorization.

27666342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139748 (or 139745 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 27666342 is about 5259.8804168916. The cubic root of 27666342 is about 302.4479048782.

The spelling of 27666342 in words is "twenty-seven million, six hundred sixty-six thousand, three hundred forty-two".