878830354825566 has 128 divisors (see below), whose sum is σ = 2109658338902016. Its totient is φ = 240507408746880.

The previous prime is 878830354825523. The next prime is 878830354825573. The reversal of 878830354825566 is 665528453038878.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a junction number, because it is equal to n+sod(n) for n = 878830354825491 and 878830354825500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 105137151 + ... + 113187813.

It is an arithmetic number, because the mean of its divisors is an integer number (16481705772672).

Almost surely, 2^{878830354825566} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878830354825566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054829169451008).

878830354825566 is an abundant number, since it is smaller than the sum of its proper divisors (1230827984076450).

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

878830354825566 is a wasteful number, since it uses less digits than its factorization.

878830354825566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053446.

The product of its (nonzero) digits is 9289728000, while the sum is 78.

The spelling of 878830354825566 in words is "eight hundred seventy-eight trillion, eight hundred thirty billion, three hundred fifty-four million, eight hundred twenty-five thousand, five hundred sixty-six".