801660 has 48 divisors (see below), whose sum is σ = 2322432. Its totient is φ = 206400.

The previous prime is 801641. The next prime is 801677. The reversal of 801660 is 66108.

It is a congruent number.

It is an unprimeable number.

801660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1645 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (48384).

2⁸⁰¹⁶⁶⁰ 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 801660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161216).

801660 is an abundant number, since it is smaller than the sum of its proper divisors (1520772).

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

801660 is a wasteful number, since it uses less digits than its factorization.

801660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 801660 is about 895.3546783259. The cubic root of 801660 is about 92.8959409579.

Adding to 801660 its reverse (66108), we get a palindrome (867768).

The spelling of 801660 in words is "eight hundred one thousand, six hundred sixty".