10871661 has 4 divisors (see below), whose sum is σ = 14495552. Its totient is φ = 7247772.

The previous prime is 10871639. The next prime is 10871677. The reversal of 10871661 is 16617801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16617801 = 3 ⋅5539267.

It is not a de Polignac number, because 10871661 - 2⁹ = 10871149 is a prime.

It is a super-3 number, since 3×10871661³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10871681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811941 + ... + 1811946.

It is an arithmetic number, because the mean of its divisors is an integer number (3623888).

Almost surely, 2^10871661 is an apocalyptic number.

It is an amenable number.

10871661 is a deficient number, since it is larger than the sum of its proper divisors (3623891).

10871661 is an equidigital number, since it uses as much as digits as its factorization.

10871661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623890.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 10871661 is about 3297.2201928291. The cubic root of 10871661 is about 221.5297040234.

The spelling of 10871661 in words is "ten million, eight hundred seventy-one thousand, six hundred sixty-one".