12466991991 has 8 divisors (see below), whose sum is σ = 16904396160. Its totient is φ = 8170457912.

The previous prime is 12466991989. The next prime is 12466991993. The reversal of 12466991991 is 19919966421.

It is an interprime number because it is at equal distance from previous prime (12466991989) and next prime (12466991993).

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 12466991991 - 2¹ = 12466991989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12466991993) 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, 35217315 + ... + 35217668.

It is an arithmetic number, because the mean of its divisors is an integer number (2113049520).

Almost surely, 2^12466991991 is an apocalyptic number.

12466991991 is a deficient number, since it is larger than the sum of its proper divisors (4437404169).

12466991991 is an equidigital number, since it uses as much as digits as its factorization.

12466991991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70435045.

The product of its digits is 1889568, while the sum is 57.

The spelling of 12466991991 in words is "twelve billion, four hundred sixty-six million, nine hundred ninety-one thousand, nine hundred ninety-one".