68006381678 has 4 divisors (see below), whose sum is σ = 102009572520. Its totient is φ = 34003190838.

The previous prime is 68006381659. The next prime is 68006381689. The reversal of 68006381678 is 87618360086.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 17001595418 + ... + 17001595421.

It is an arithmetic number, because the mean of its divisors is an integer number (25502393130).

Almost surely, 2^68006381678 is an apocalyptic number.

68006381678 is a deficient number, since it is larger than the sum of its proper divisors (34003190842).

68006381678 is a wasteful number, since it uses less digits than its factorization.

68006381678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34003190841.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 68006381678 in words is "sixty-eight billion, six million, three hundred eighty-one thousand, six hundred seventy-eight".