12666166651 has 8 divisors (see below), whose sum is σ = 13079711744. Its totient is φ = 12252931560.

The previous prime is 12666166649. The next prime is 12666166699. The reversal of 12666166651 is 15666166621.

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

It is a cyclic number.

It is not a de Polignac number, because 12666166651 - 2¹ = 12666166649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12636166651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7030 + ... + 159316.

It is an arithmetic number, because the mean of its divisors is an integer number (1634963968).

Almost surely, 2^12666166651 is an apocalyptic number.

12666166651 is a deficient number, since it is larger than the sum of its proper divisors (413545093).

12666166651 is a wasteful number, since it uses less digits than its factorization.

12666166651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155001.

The product of its digits is 466560, while the sum is 46.

The spelling of 12666166651 in words is "twelve billion, six hundred sixty-six million, one hundred sixty-six thousand, six hundred fifty-one".