68066917 has 4 divisors (see below), whose sum is σ = 70262656. Its totient is φ = 65871180.

The previous prime is 68066899. The next prime is 68066981. The reversal of 68066917 is 71966086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71966086 = 2 ⋅35983043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68066917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68066617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097823 + ... + 1097884.

It is an arithmetic number, because the mean of its divisors is an integer number (17565664).

Almost surely, 2^68066917 is an apocalyptic number.

It is an amenable number.

68066917 is a deficient number, since it is larger than the sum of its proper divisors (2195739).

68066917 is a wasteful number, since it uses less digits than its factorization.

68066917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195738.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 68066917 is about 8250.2676926267. The cubic root of 68066917 is about 408.2993545885.

The spelling of 68066917 in words is "sixty-eight million, sixty-six thousand, nine hundred seventeen".