27666268019 has 4 divisors (see below), whose sum is σ = 29794442496. Its totient is φ = 25538093544.

The previous prime is 27666267977. The next prime is 27666268067. The reversal of 27666268019 is 91086266672.

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 27666268019 - 2²⁰ = 27665219443 is a prime.

It is a super-2 number, since 2×27666268019² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27666268219) 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, 1064087219 + ... + 1064087244.

It is an arithmetic number, because the mean of its divisors is an integer number (7448610624).

Almost surely, 2^27666268019 is an apocalyptic number.

27666268019 is a deficient number, since it is larger than the sum of its proper divisors (2128174477).

27666268019 is a wasteful number, since it uses less digits than its factorization.

27666268019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128174476.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 27666268019 in words is "twenty-seven billion, six hundred sixty-six million, two hundred sixty-eight thousand, nineteen".