8375437661 has 2 divisors, whose sum is σ = 8375437662. Its totient is φ = 8375437660.

The previous prime is 8375437601. The next prime is 8375437691. The reversal of 8375437661 is 1667345738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6937890436 + 1437547225 = 83294^2 + 37915^2 .

It is a cyclic number.

It is not a de Polignac number, because 8375437661 - 2²² = 8371243357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8375437601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4187718830 + 4187718831.

It is an arithmetic number, because the mean of its divisors is an integer number (4187718831).

Almost surely, 2^8375437661 is an apocalyptic number.

It is an amenable number.

8375437661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8375437661 is an equidigital number, since it uses as much as digits as its factorization.

8375437661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 50.

The square root of 8375437661 is about 91517.4172548592. The cubic root of 8375437661 is about 2030.8094243570.

The spelling of 8375437661 in words is "eight billion, three hundred seventy-five million, four hundred thirty-seven thousand, six hundred sixty-one".