12466991993 has 2 divisors, whose sum is σ = 12466991994. Its totient is φ = 12466991992.

The previous prime is 12466991989. The next prime is 12466992017. The reversal of 12466991993 is 39919966421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11005688464 + 1461303529 = 104908^2 + 38227^2 .

It is a cyclic number.

It is not a de Polignac number, because 12466991993 - 2² = 12466991989 is a prime.

It is a super-2 number, since 2×12466991993² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12466990993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6233495996 + 6233495997.

It is an arithmetic number, because the mean of its divisors is an integer number (6233495997).

Almost surely, 2^12466991993 is an apocalyptic number.

It is an amenable number.

12466991993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12466991993 is an equidigital number, since it uses as much as digits as its factorization.

12466991993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 59.

The spelling of 12466991993 in words is "twelve billion, four hundred sixty-six million, nine hundred ninety-one thousand, nine hundred ninety-three".