27666390039 has 4 divisors (see below), whose sum is σ = 36888520056. Its totient is φ = 18444260024.

The previous prime is 27666390013. The next prime is 27666390049. The reversal of 27666390039 is 93009366672.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27666390039 - 2⁵ = 27666390007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27666389973 and 27666390000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27666390049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4611065004 + ... + 4611065009.

It is an arithmetic number, because the mean of its divisors is an integer number (9222130014).

Almost surely, 2^27666390039 is an apocalyptic number.

27666390039 is a deficient number, since it is larger than the sum of its proper divisors (9222130017).

27666390039 is an equidigital number, since it uses as much as digits as its factorization.

27666390039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9222130016.

The product of its (nonzero) digits is 2204496, while the sum is 51.

The spelling of 27666390039 in words is "twenty-seven billion, six hundred sixty-six million, three hundred ninety thousand, thirty-nine".