80665889792 has 44 divisors (see below), whose sum is σ = 161602232736. Its totient is φ = 40245596160.

The previous prime is 80665889779. The next prime is 80665889851. The reversal of 80665889792 is 29798856608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389042 + ... + 559182.

Almost surely, 2^80665889792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80665889792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80801116368).

80665889792 is an abundant number, since it is smaller than the sum of its proper divisors (80936342944).

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

80665889792 is a wasteful number, since it uses less digits than its factorization.

80665889792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170624 (or 170606 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 68.

The spelling of 80665889792 in words is "eighty billion, six hundred sixty-five million, eight hundred eighty-nine thousand, seven hundred ninety-two".