810231660 has 360 divisors, whose sum is σ = 3024196560. Its totient is φ = 181004544.

The previous prime is 810231659. The next prime is 810231673. The reversal of 810231660 is 66132018.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4683334 + ... + 4683506.

It is an arithmetic number, because the mean of its divisors is an integer number (8400546).

Almost surely, 2^810231660 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 810231660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512098280).

810231660 is an abundant number, since it is smaller than the sum of its proper divisors (2213964900).

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

810231660 is a wasteful number, since it uses less digits than its factorization.

810231660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 810231660 is about 28464.5685019113. The cubic root of 810231660 is about 932.2586101652.

Adding to 810231660 its reverse (66132018), we get a palindrome (876363678).

The spelling of 810231660 in words is "eight hundred ten million, two hundred thirty-one thousand, six hundred sixty".