68665699 has 2 divisors, whose sum is σ = 68665700. Its totient is φ = 68665698.

The previous prime is 68665697. The next prime is 68665717. The reversal of 68665699 is 99656686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68665699 - 2¹ = 68665697 is a prime.

Together with 68665697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68665697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34332849 + 34332850.

It is an arithmetic number, because the mean of its divisors is an integer number (34332850).

Almost surely, 2^68665699 is an apocalyptic number.

68665699 is a deficient number, since it is larger than the sum of its proper divisors (1).

68665699 is an equidigital number, since it uses as much as digits as its factorization.

68665699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 55.

The square root of 68665699 is about 8286.4768750054. The cubic root of 68665699 is about 409.4931253545.

The spelling of 68665699 in words is "sixty-eight million, six hundred sixty-five thousand, six hundred ninety-nine".