7668158437 has 2 divisors, whose sum is σ = 7668158438. Its totient is φ = 7668158436.

The previous prime is 7668158423. The next prime is 7668158447. The reversal of 7668158437 is 7348518667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6138879201 + 1529279236 = 78351^2 + 39106^2 .

It is a cyclic number.

It is not a de Polignac number, because 7668158437 - 2¹¹ = 7668156389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7668158447) 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, 3834079218 + 3834079219.

It is an arithmetic number, because the mean of its divisors is an integer number (3834079219).

Almost surely, 2^7668158437 is an apocalyptic number.

It is an amenable number.

7668158437 is a deficient number, since it is larger than the sum of its proper divisors (1).

7668158437 is an equidigital number, since it uses as much as digits as its factorization.

7668158437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 55.

The square root of 7668158437 is about 87568.0217716490. The cubic root of 7668158437 is about 1971.9551168251.

The spelling of 7668158437 in words is "seven billion, six hundred sixty-eight million, one hundred fifty-eight thousand, four hundred thirty-seven".