68809856394066 has 32 divisors (see below), whose sum is σ = 139010556672000. Its totient is φ = 22705134565776.

The previous prime is 68809856393977. The next prime is 68809856394101. The reversal of 68809856394066 is 66049365890886.

It is a junction number, because it is equal to n+sod(n) for n = 68809856393982 and 68809856394000.

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, 39532566 + ... + 41236433.

It is an arithmetic number, because the mean of its divisors is an integer number (4344079896000).

Almost surely, 2^{68809856394066} is an apocalyptic number.

68809856394066 is an abundant number, since it is smaller than the sum of its proper divisors (70200700277934).

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

68809856394066 is a wasteful number, since it uses less digits than its factorization.

68809856394066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80770438.

The product of its (nonzero) digits is 3224862720, while the sum is 78.

The spelling of 68809856394066 in words is "sixty-eight trillion, eight hundred nine billion, eight hundred fifty-six million, three hundred ninety-four thousand, sixty-six".