27874386661 has 4 divisors (see below), whose sum is σ = 30408421824. Its totient is φ = 25340351500.

The previous prime is 27874386559. The next prime is 27874386671. The reversal of 27874386661 is 16668347872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27874386661 - 2¹¹ = 27874384613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27874386596 and 27874386605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27874386671) 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, 1267017565 + ... + 1267017586.

It is an arithmetic number, because the mean of its divisors is an integer number (7602105456).

Almost surely, 2^27874386661 is an apocalyptic number.

It is an amenable number.

27874386661 is a deficient number, since it is larger than the sum of its proper divisors (2534035163).

27874386661 is a wasteful number, since it uses less digits than its factorization.

27874386661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534035162.

The product of its digits is 16257024, while the sum is 58.

The spelling of 27874386661 in words is "twenty-seven billion, eight hundred seventy-four million, three hundred eighty-six thousand, six hundred sixty-one".