6663567742771 has 4 divisors (see below), whose sum is σ = 6663582758944. Its totient is φ = 6663552726600.

The previous prime is 6663567742757. The next prime is 6663567742823. The reversal of 6663567742771 is 1772477653666.

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 6663567742771 - 2¹⁵ = 6663567710003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6663567742697 and 6663567742706.

It is not an unprimeable number, because it can be changed into a prime (6661567742771) 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, 6821520 + ... + 7736941.

It is an arithmetic number, because the mean of its divisors is an integer number (1665895689736).

Almost surely, 2^{6663567742771} is an apocalyptic number.

6663567742771 is a deficient number, since it is larger than the sum of its proper divisors (15016173).

6663567742771 is a wasteful number, since it uses less digits than its factorization.

6663567742771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15016172.

The product of its digits is 373403520, while the sum is 67.

The spelling of 6663567742771 in words is "six trillion, six hundred sixty-three billion, five hundred sixty-seven million, seven hundred forty-two thousand, seven hundred seventy-one".