6551133749 has 2 divisors, whose sum is σ = 6551133750. Its totient is φ = 6551133748.

The previous prime is 6551133731. The next prime is 6551133751. The reversal of 6551133749 is 9473311556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5671596100 + 879537649 = 75310^2 + 29657^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551133749 - 2²⁴ = 6534356533 is a prime.

It is a Sophie Germain prime.

Together with 6551133751, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6551133049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275566874 + 3275566875.

It is an arithmetic number, because the mean of its divisors is an integer number (3275566875).

Almost surely, 2^6551133749 is an apocalyptic number.

It is an amenable number.

6551133749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551133749 is an equidigital number, since it uses as much as digits as its factorization.

6551133749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 44.

The square root of 6551133749 is about 80939.0743028360. The cubic root of 6551133749 is about 1871.1365781576.

The spelling of 6551133749 in words is "six billion, five hundred fifty-one million, one hundred thirty-three thousand, seven hundred forty-nine".