68307666550320 has 80 divisors (see below), whose sum is σ = 211934598746112. Its totient is φ = 18199822268160.

The previous prime is 68307666550309. The next prime is 68307666550327. The reversal of 68307666550320 is 2305566670386.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (68307666550327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121245552 + ... + 121807631.

Almost surely, 2^{68307666550320} is an apocalyptic number.

68307666550320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68307666550320 is an abundant number, since it is smaller than the sum of its proper divisors (143626932195792).

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

68307666550320 is a wasteful number, since it uses less digits than its factorization.

68307666550320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243054370 (or 243054364 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 57.

The spelling of 68307666550320 in words is "sixty-eight trillion, three hundred seven billion, six hundred sixty-six million, five hundred fifty thousand, three hundred twenty".