887661 has 24 divisors (see below), whose sum is σ = 1404000. Its totient is φ = 538272.

The previous prime is 887659. The next prime is 887669. The reversal of 887661 is 166788.

It is not a de Polignac number, because 887661 - 2¹ = 887659 is a prime.

887661 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (887669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4870 + ... + 5048.

It is an arithmetic number, because the mean of its divisors is an integer number (58500).

2⁸⁸⁷⁶⁶¹ is an apocalyptic number.

It is an amenable number.

887661 is a deficient number, since it is larger than the sum of its proper divisors (516339).

887661 is a wasteful number, since it uses less digits than its factorization.

887661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 230 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 887661 is about 942.1576301235. The cubic root of 887661 is about 96.1056778967.

The spelling of 887661 in words is "eight hundred eighty-seven thousand, six hundred sixty-one".