10818661 has 6 divisors (see below), whose sum is σ = 12585030. Its totient is φ = 9273096.

The previous prime is 10818641. The next prime is 10818683. The reversal of 10818661 is 16681801.

It is a happy number.

10818661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10278436 + 540225 = 3206^2 + 735^2 .

It is not a de Polignac number, because 10818661 - 2⁹ = 10818149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10818641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110346 + ... + 110443.

It is an arithmetic number, because the mean of its divisors is an integer number (2097505).

Almost surely, 2^10818661 is an apocalyptic number.

It is an amenable number.

10818661 is a deficient number, since it is larger than the sum of its proper divisors (1766369).

10818661 is an equidigital number, since it uses as much as digits as its factorization.

10818661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220803 (or 220796 counting only the distinct ones).

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

The square root of 10818661 is about 3289.1733003902. The cubic root of 10818661 is about 221.1691272407.

It can be divided in two parts, 108 and 18661, that added together give a square (18769 = 137²).

The spelling of 10818661 in words is "ten million, eight hundred eighteen thousand, six hundred sixty-one".