78824558170566 has 96 divisors (see below), whose sum is σ = 184326698556000. Its totient is φ = 24200621102592.

The previous prime is 78824558170537. The next prime is 78824558170607. The reversal of 78824558170566 is 66507185542887.

78824558170566 is a `hidden beast` number, since 7 + 8 + 8 + 2 + 4 + 5 + 58 + 1 + 7 + 0 + 566 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 78824558170494 and 78824558170503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 660018490 + ... + 660137906.

It is an arithmetic number, because the mean of its divisors is an integer number (1920069776625).

Almost surely, 2^{78824558170566} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78824558170566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92163349278000).

78824558170566 is an abundant number, since it is smaller than the sum of its proper divisors (105502140385434).

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

78824558170566 is a wasteful number, since it uses less digits than its factorization.

78824558170566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125590 (or 125587 counting only the distinct ones).

The product of its (nonzero) digits is 903168000, while the sum is 72.

The spelling of 78824558170566 in words is "seventy-eight trillion, eight hundred twenty-four billion, five hundred fifty-eight million, one hundred seventy thousand, five hundred sixty-six".