669565827876 has 96 divisors (see below), whose sum is σ = 1715639184000. Its totient is φ = 201558712320.

The previous prime is 669565827817. The next prime is 669565827881. The reversal of 669565827876 is 678728565966.

It is a junction number, because it is equal to n+sod(n) for n = 669565827798 and 669565827807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13547706 + ... + 13597038.

It is an arithmetic number, because the mean of its divisors is an integer number (17871241500).

Almost surely, 2^669565827876 is an apocalyptic number.

669565827876 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669565827876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857819592000).

669565827876 is an abundant number, since it is smaller than the sum of its proper divisors (1046073356124).

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

669565827876 is a wasteful number, since it uses less digits than its factorization.

669565827876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50029 (or 50027 counting only the distinct ones).

The product of its digits is 1828915200, while the sum is 75.

The spelling of 669565827876 in words is "six hundred sixty-nine billion, five hundred sixty-five million, eight hundred twenty-seven thousand, eight hundred seventy-six".