12057169666 has 4 divisors (see below), whose sum is σ = 18085754502. Its totient is φ = 6028584832.

The previous prime is 12057169639. The next prime is 12057169673. The reversal of 12057169666 is 66696175021.

12057169666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 7478617441 + 4578552225 = 86479^2 + 67665^2 .

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 an unprimeable number.

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 as a sum of consecutive naturals, namely, 3014292415 + ... + 3014292418.

Almost surely, 2^12057169666 is an apocalyptic number.

12057169666 is a deficient number, since it is larger than the sum of its proper divisors (6028584836).

12057169666 is an equidigital number, since it uses as much as digits as its factorization.

12057169666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6028584835.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 12057169666 in words is "twelve billion, fifty-seven million, one hundred sixty-nine thousand, six hundred sixty-six".