12166403554 has 8 divisors (see below), whose sum is σ = 18317448540. Its totient is φ = 6060587376.

The previous prime is 12166403497. The next prime is 12166403563. The reversal of 12166403554 is 45530466121.

12166403554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10607970025 + 1558433529 = 102995^2 + 39477^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 11306529 + ... + 11307604.

Almost surely, 2^12166403554 is an apocalyptic number.

12166403554 is a deficient number, since it is larger than the sum of its proper divisors (6151044986).

12166403554 is a wasteful number, since it uses less digits than its factorization.

12166403554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22614404.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 12166403554 its reverse (45530466121), we get a palindrome (57696869675).

The spelling of 12166403554 in words is "twelve billion, one hundred sixty-six million, four hundred three thousand, five hundred fifty-four".