68566769 has 2 divisors, whose sum is σ = 68566770. Its totient is φ = 68566768.

The previous prime is 68566753. The next prime is 68566781. The reversal of 68566769 is 96766586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 4566769 = 8000^2 + 2137^2 .

It is a cyclic number.

It is not a de Polignac number, because 68566769 - 2⁴ = 68566753 is a prime.

It is a super-2 number, since 2×68566769² = 9402803622198722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68566769.

It is not a weakly prime, because it can be changed into another prime (68566709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34283384 + 34283385.

It is an arithmetic number, because the mean of its divisors is an integer number (34283385).

Almost surely, 2^68566769 is an apocalyptic number.

It is an amenable number.

68566769 is a deficient number, since it is larger than the sum of its proper divisors (1).

68566769 is an equidigital number, since it uses as much as digits as its factorization.

68566769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 53.

The square root of 68566769 is about 8280.5053589742. The cubic root of 68566769 is about 409.2963719705.

The spelling of 68566769 in words is "sixty-eight million, five hundred sixty-six thousand, seven hundred sixty-nine".