10881661 has 8 divisors (see below), whose sum is σ = 13090880. Its totient is φ = 8836128.

The previous prime is 10881631. The next prime is 10881677. The reversal of 10881661 is 16618801.

It is a happy number.

10881661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 10881661 - 2⁹ = 10881149 is a prime.

It is a super-2 number, since 2×10881661² = 236821092237842, which contains 22 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 (10881631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40776 + ... + 41041.

It is an arithmetic number, because the mean of its divisors is an integer number (1636360).

Almost surely, 2^10881661 is an apocalyptic number.

It is an amenable number.

10881661 is a deficient number, since it is larger than the sum of its proper divisors (2209219).

10881661 is an equidigital number, since it uses as much as digits as its factorization.

10881661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81843.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 10881661 is about 3298.7362731810. The cubic root of 10881661 is about 221.5976058880.

The spelling of 10881661 in words is "ten million, eight hundred eighty-one thousand, six hundred sixty-one".