12179126661 has 8 divisors (see below), whose sum is σ = 17487976800. Its totient is φ = 7494847152.

The previous prime is 12179126647. The next prime is 12179126677. The reversal of 12179126661 is 16662197121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12179126661 - 2¹⁴ = 12179110277 is a prime.

It is a super-2 number, since 2×12179126661² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12179122661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156142611 + ... + 156142688.

It is an arithmetic number, because the mean of its divisors is an integer number (2185997100).

Almost surely, 2^12179126661 is an apocalyptic number.

It is an amenable number.

12179126661 is a deficient number, since it is larger than the sum of its proper divisors (5308850139).

12179126661 is a wasteful number, since it uses less digits than its factorization.

12179126661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312285315.

The product of its digits is 54432, while the sum is 42.

The spelling of 12179126661 in words is "twelve billion, one hundred seventy-nine million, one hundred twenty-six thousand, six hundred sixty-one".