12666010634 has 4 divisors (see below), whose sum is σ = 18999015954. Its totient is φ = 6333005316.

The previous prime is 12666010619. The next prime is 12666010661. The reversal of 12666010634 is 43601066621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43601066621 = 7 ⋅6228723803.

It can be written as a sum of positive squares in only one way, i.e., 6545295409 + 6120715225 = 80903^2 + 78235^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12666010594 and 12666010603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3166502657 + ... + 3166502660.

Almost surely, 2^12666010634 is an apocalyptic number.

12666010634 is a deficient number, since it is larger than the sum of its proper divisors (6333005320).

12666010634 is an equidigital number, since it uses as much as digits as its factorization.

12666010634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6333005319.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 12666010634 in words is "twelve billion, six hundred sixty-six million, ten thousand, six hundred thirty-four".