68645458566 has 24 divisors (see below), whose sum is σ = 149370170040. Its totient is φ = 22783612896.

The previous prime is 68645458523. The next prime is 68645458571. The reversal of 68645458566 is 66585454686.

It is a happy number.

68645458566 is a `hidden beast` number, since 6 + 8 + 6 + 4 + 545 + 85 + 6 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8179576 + ... + 8187963.

It is an arithmetic number, because the mean of its divisors is an integer number (6223757085).

Almost surely, 2^68645458566 is an apocalyptic number.

68645458566 is an abundant number, since it is smaller than the sum of its proper divisors (80724711474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68645458566 is a wasteful number, since it uses less digits than its factorization.

68645458566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16367780 (or 16367777 counting only the distinct ones).

The product of its digits is 165888000, while the sum is 63.

The spelling of 68645458566 in words is "sixty-eight billion, six hundred forty-five million, four hundred fifty-eight thousand, five hundred sixty-six".