68805666 has 32 divisors (see below), whose sum is σ = 153316800. Its totient is φ = 22872960.

The previous prime is 68805637. The next prime is 68805677. The reversal of 68805666 is 66650886.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21106 + ... + 24146.

It is an arithmetic number, because the mean of its divisors is an integer number (4791150).

Almost surely, 2^68805666 is an apocalyptic number.

68805666 is an abundant number, since it is smaller than the sum of its proper divisors (84511134).

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

68805666 is a wasteful number, since it uses less digits than its factorization.

68805666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471 (or 3465 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 68805666 is about 8294.9180827782. The cubic root of 68805666 is about 409.7711711400.

The spelling of 68805666 in words is "sixty-eight million, eight hundred five thousand, six hundred sixty-six".