80566755568 has 80 divisors (see below), whose sum is σ = 175669381440. Its totient is φ = 35516270592.

The previous prime is 80566755557. The next prime is 80566755587. The reversal of 80566755568 is 86555766508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3379980 + ... + 3403732.

It is an arithmetic number, because the mean of its divisors is an integer number (2195867268).

Almost surely, 2^80566755568 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 80566755568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87834690720).

80566755568 is an abundant number, since it is smaller than the sum of its proper divisors (95102625872).

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

80566755568 is a wasteful number, since it uses less digits than its factorization.

80566755568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24506 (or 24500 counting only the distinct ones).

The product of its (nonzero) digits is 60480000, while the sum is 61.

The spelling of 80566755568 in words is "eighty billion, five hundred sixty-six million, seven hundred fifty-five thousand, five hundred sixty-eight".