12166051599 has 18 divisors (see below), whose sum is σ = 19028954880. Its totient is φ = 7486800048.

The previous prime is 12166051591. The next prime is 12166051603. The reversal of 12166051599 is 99515066121.

It is a happy number.

12166051599 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 6 + 0 + 51 + 599 = 666.

It is not a de Polignac number, because 12166051599 - 2³ = 12166051591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166051591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3997839 + ... + 4000880.

It is an arithmetic number, because the mean of its divisors is an integer number (1057164160).

Almost surely, 2^12166051599 is an apocalyptic number.

12166051599 is a deficient number, since it is larger than the sum of its proper divisors (6862903281).

12166051599 is a wasteful number, since it uses less digits than its factorization.

12166051599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998751 (or 7998735 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The spelling of 12166051599 in words is "twelve billion, one hundred sixty-six million, fifty-one thousand, five hundred ninety-nine".