12647166746 has 4 divisors (see below), whose sum is σ = 18970750122. Its totient is φ = 6323583372.

The previous prime is 12647166743. The next prime is 12647166767. The reversal of 12647166746 is 64766174621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10057883521 + 2589283225 = 100289^2 + 50885^2 .

It is a super-2 number, since 2×12647166746² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12647166694 and 12647166703.

It is not an unprimeable number, because it can be changed into a prime (12647166743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3161791685 + ... + 3161791688.

Almost surely, 2^12647166746 is an apocalyptic number.

12647166746 is a deficient number, since it is larger than the sum of its proper divisors (6323583376).

12647166746 is an equidigital number, since it uses as much as digits as its factorization.

12647166746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323583375.

The product of its digits is 2032128, while the sum is 50.

The spelling of 12647166746 in words is "twelve billion, six hundred forty-seven million, one hundred sixty-six thousand, seven hundred forty-six".