10661223 has 16 divisors (see below), whose sum is σ = 15033600. Its totient is φ = 6701760.

The previous prime is 10661219. The next prime is 10661237. The reversal of 10661223 is 32216601.

It is a happy number.

It is not a de Polignac number, because 10661223 - 2² = 10661219 is a prime.

It is a super-2 number, since 2×10661223² = 227323351711458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10661223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20203 + ... + 20723.

It is an arithmetic number, because the mean of its divisors is an integer number (939600).

Almost surely, 2^10661223 is an apocalyptic number.

10661223 is a deficient number, since it is larger than the sum of its proper divisors (4372377).

10661223 is a wasteful number, since it uses less digits than its factorization.

10661223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 10661223 is about 3265.1528295012. The cubic root of 10661223 is about 220.0910298223.

Adding to 10661223 its reverse (32216601), we get a palindrome (42877824).

The spelling of 10661223 in words is "ten million, six hundred sixty-one thousand, two hundred twenty-three".