7750668389 has 2 divisors, whose sum is σ = 7750668390. Its totient is φ = 7750668388.

The previous prime is 7750668379. The next prime is 7750668469. The reversal of 7750668389 is 9838660577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7518624100 + 232044289 = 86710^2 + 15233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7750668389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7750668379) 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, 3875334194 + 3875334195.

It is an arithmetic number, because the mean of its divisors is an integer number (3875334195).

Almost surely, 2^7750668389 is an apocalyptic number.

It is an amenable number.

7750668389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7750668389 is an equidigital number, since it uses as much as digits as its factorization.

7750668389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The square root of 7750668389 is about 88037.8804208734. The cubic root of 7750668389 is about 1979.0026937686.

The spelling of 7750668389 in words is "seven billion, seven hundred fifty million, six hundred sixty-eight thousand, three hundred eighty-nine".