27666040043 has 4 divisors (see below), whose sum is σ = 27666384360. Its totient is φ = 27665695728.

The previous prime is 27666040037. The next prime is 27666040067. The reversal of 27666040043 is 34004066672.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27666040043 - 2⁴ = 27666040027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27666039979 and 27666040006.

It is not an unprimeable number, because it can be changed into a prime (27666040033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19463 + ... + 236031.

It is an arithmetic number, because the mean of its divisors is an integer number (6916596090).

Almost surely, 2^27666040043 is an apocalyptic number.

27666040043 is a deficient number, since it is larger than the sum of its proper divisors (344317).

27666040043 is a wasteful number, since it uses less digits than its factorization.

27666040043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344316.

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 27666040043 in words is "twenty-seven billion, six hundred sixty-six million, forty thousand, forty-three".