68662757 has 2 divisors, whose sum is σ = 68662758. Its totient is φ = 68662756.

The previous prime is 68662753. The next prime is 68662793. The reversal of 68662757 is 75726686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65836996 + 2825761 = 8114^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 68662757 - 2² = 68662753 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68662753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34331378 + 34331379.

It is an arithmetic number, because the mean of its divisors is an integer number (34331379).

Almost surely, 2^68662757 is an apocalyptic number.

It is an amenable number.

68662757 is a deficient number, since it is larger than the sum of its proper divisors (1).

68662757 is an equidigital number, since it uses as much as digits as its factorization.

68662757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 68662757 is about 8286.2993549594. The cubic root of 68662757 is about 409.4872769906.

The spelling of 68662757 in words is "sixty-eight million, six hundred sixty-two thousand, seven hundred fifty-seven".