12027027177661 has 4 divisors (see below), whose sum is σ = 12027143999232. Its totient is φ = 12026910356092.

The previous prime is 12027027177653. The next prime is 12027027177721. The reversal of 12027027177661 is 16677172072021.

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 12027027177661 - 2³ = 12027027177653 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12027027177601) 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, 58256221 + ... + 58462306.

It is an arithmetic number, because the mean of its divisors is an integer number (3006785999808).

Almost surely, 2^{12027027177661} is an apocalyptic number.

It is an amenable number.

12027027177661 is a deficient number, since it is larger than the sum of its proper divisors (116821571).

12027027177661 is a wasteful number, since it uses less digits than its factorization.

12027027177661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116821570.

The product of its (nonzero) digits is 691488, while the sum is 49.

The spelling of 12027027177661 in words is "twelve trillion, twenty-seven billion, twenty-seven million, one hundred seventy-seven thousand, six hundred sixty-one".