12457666117 has 4 divisors (see below), whose sum is σ = 13415948140. Its totient is φ = 11499384096.

The previous prime is 12457666061. The next prime is 12457666171. The reversal of 12457666117 is 71166675421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71166675421 = 127 ⋅560367523.

It can be written as a sum of positive squares in 2 ways, for example, as 2825028801 + 9632637316 = 53151^2 + 98146^2 .

It is a cyclic number.

It is not a de Polignac number, because 12457666117 - 2²³ = 12449277509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12457666187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479140992 + ... + 479141017.

It is an arithmetic number, because the mean of its divisors is an integer number (3353987035).

Almost surely, 2^12457666117 is an apocalyptic number.

It is an amenable number.

12457666117 is a deficient number, since it is larger than the sum of its proper divisors (958282023).

12457666117 is an equidigital number, since it uses as much as digits as its factorization.

12457666117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958282022.

The product of its digits is 423360, while the sum is 46.

The spelling of 12457666117 in words is "twelve billion, four hundred fifty-seven million, six hundred sixty-six thousand, one hundred seventeen".