68305105667 has 16 divisors (see below), whose sum is σ = 70993806240. Its totient is φ = 65666764800.

The previous prime is 68305105657. The next prime is 68305105679. The reversal of 68305105667 is 76650150386.

It is a cyclic number.

It is not a de Polignac number, because 68305105667 - 2¹⁴ = 68305089283 is a prime.

It is a super-3 number, since 3×68305105667³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68305105607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3495059 + ... + 3514547.

It is an arithmetic number, because the mean of its divisors is an integer number (4437112890).

Almost surely, 2^68305105667 is an apocalyptic number.

68305105667 is a deficient number, since it is larger than the sum of its proper divisors (2688700573).

68305105667 is a wasteful number, since it uses less digits than its factorization.

68305105667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20774.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 68305105667 in words is "sixty-eight billion, three hundred five million, one hundred five thousand, six hundred sixty-seven".