881566 has 8 divisors (see below), whose sum is σ = 1511280. Its totient is φ = 377808.

The previous prime is 881539. The next prime is 881591. The reversal of 881566 is 665188.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×881566² = 1554317224712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

881566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31471 + ... + 31498.

It is an arithmetic number, because the mean of its divisors is an integer number (188910).

2⁸⁸¹⁵⁶⁶ is an apocalyptic number.

881566 is a deficient number, since it is larger than the sum of its proper divisors (629714).

881566 is a wasteful number, since it uses less digits than its factorization.

881566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62978.

The product of its digits is 11520, while the sum is 34.

The square root of 881566 is about 938.9174617611. The cubic root of 881566 is about 95.8852071188.

The spelling of 881566 in words is "eight hundred eighty-one thousand, five hundred sixty-six".