12747443220667 has 4 divisors (see below), whose sum is σ = 12749441572120. Its totient is φ = 12745444869216.

The previous prime is 12747443220619. The next prime is 12747443220683. The reversal of 12747443220667 is 76602234474721.

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

It is a cyclic number.

It is not a de Polignac number, because 12747443220667 - 2²³ = 12747434832059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12747443220467) 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, 999166158 + ... + 999178915.

It is an arithmetic number, because the mean of its divisors is an integer number (3187360393030).

Almost surely, 2^{12747443220667} is an apocalyptic number.

12747443220667 is a deficient number, since it is larger than the sum of its proper divisors (1998351453).

12747443220667 is an equidigital number, since it uses as much as digits as its factorization.

12747443220667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998351452.

The product of its (nonzero) digits is 18966528, while the sum is 55.

The spelling of 12747443220667 in words is "twelve trillion, seven hundred forty-seven billion, four hundred forty-three million, two hundred twenty thousand, six hundred sixty-seven".