68664017 has 2 divisors, whose sum is σ = 68664018. Its totient is φ = 68664016.

The previous prime is 68663999. The next prime is 68664031. The reversal of 68664017 is 71046686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66601921 + 2062096 = 8161^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 68664017 - 2⁸ = 68663761 is a prime.

It is not a weakly prime, because it can be changed into another prime (68664067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34332008 + 34332009.

It is an arithmetic number, because the mean of its divisors is an integer number (34332009).

Almost surely, 2^68664017 is an apocalyptic number.

It is an amenable number.

68664017 is a deficient number, since it is larger than the sum of its proper divisors (1).

68664017 is an equidigital number, since it uses as much as digits as its factorization.

68664017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 68664017 is about 8286.3753837248. The cubic root of 68664017 is about 409.4897817488.

The spelling of 68664017 in words is "sixty-eight million, six hundred sixty-four thousand, seventeen".