80660 has 24 divisors (see below), whose sum is σ = 175560. Its totient is φ = 31104.

The previous prime is 80657. The next prime is 80669. The reversal of 80660 is 6608.

It can be written as a sum of positive squares in 4 ways, for example, as 29584 + 51076 = 172^2 + 226^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686 + ... + 794.

It is an arithmetic number, because the mean of its divisors is an integer number (7315).

2⁸⁰⁶⁶⁰ 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 80660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87780).

80660 is an abundant number, since it is smaller than the sum of its proper divisors (94900).

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

80660 is a wasteful number, since it uses less digits than its factorization.

80660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 80660 is about 284.0070421662. The cubic root of 80660 is about 43.2068633357.

The spelling of 80660 in words is "eighty thousand, six hundred sixty".