8331566149 has 2 divisors, whose sum is σ = 8331566150. Its totient is φ = 8331566148.

The previous prime is 8331566147. The next prime is 8331566209. The reversal of 8331566149 is 9416651338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6952557924 + 1379008225 = 83382^2 + 37135^2 .

It is a cyclic number.

It is not a de Polignac number, because 8331566149 - 2¹ = 8331566147 is a prime.

Together with 8331566147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8331566099 and 8331566108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8331566143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165783074 + 4165783075.

It is an arithmetic number, because the mean of its divisors is an integer number (4165783075).

Almost surely, 2^8331566149 is an apocalyptic number.

It is an amenable number.

8331566149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8331566149 is an equidigital number, since it uses as much as digits as its factorization.

8331566149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 46.

The square root of 8331566149 is about 91277.4131370954. The cubic root of 8331566149 is about 2027.2573434319.

The spelling of 8331566149 in words is "eight billion, three hundred thirty-one million, five hundred sixty-six thousand, one hundred forty-nine".