68105206259566 has 16 divisors (see below), whose sum is σ = 117064789627104. Its totient is φ = 29109693672864.

The previous prime is 68105206259543. The next prime is 68105206259581. The reversal of 68105206259566 is 66595260250186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6520983505 + ... + 6520993948.

It is an arithmetic number, because the mean of its divisors is an integer number (7316549351694).

Almost surely, 2^{68105206259566} is an apocalyptic number.

68105206259566 is a deficient number, since it is larger than the sum of its proper divisors (48959583367538).

68105206259566 is a wasteful number, since it uses less digits than its factorization.

68105206259566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13041977835.

The product of its (nonzero) digits is 46656000, while the sum is 61.

The spelling of 68105206259566 in words is "sixty-eight trillion, one hundred five billion, two hundred six million, two hundred fifty-nine thousand, five hundred sixty-six".