881660 has 24 divisors (see below), whose sum is σ = 1994496. Its totient is φ = 325440.

The previous prime is 881641. The next prime is 881663. The reversal of 881660 is 66188.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881663) by changing a digit.

881660 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 7 ways as a sum of consecutive naturals, for example, 1436 + ... + 1955.

It is an arithmetic number, because the mean of its divisors is an integer number (83104).

2⁸⁸¹⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

881660 is an abundant number, since it is smaller than the sum of its proper divisors (1112836).

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

881660 is a wasteful number, since it uses less digits than its factorization.

881660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413 (or 3411 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 881660 is about 938.9675180750. The cubic root of 881660 is about 95.8886150274. Note that the first 3 decimals are identical.

The spelling of 881660 in words is "eight hundred eighty-one thousand, six hundred sixty".