11206665 has 12 divisors (see below), whose sum is σ = 19424964. Its totient is φ = 5976864.

The previous prime is 11206649. The next prime is 11206697. The reversal of 11206665 is 56660211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8856576 + 2350089 = 2976^2 + 1533^2 .

It is not a de Polignac number, because 11206665 - 2⁴ = 11206649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124474 + ... + 124563.

It is an arithmetic number, because the mean of its divisors is an integer number (1618747).

Almost surely, 2^11206665 is an apocalyptic number.

11206665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11206665 is a deficient number, since it is larger than the sum of its proper divisors (8218299).

11206665 is a wasteful number, since it uses less digits than its factorization.

11206665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249048 (or 249045 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 11206665 is about 3347.6357328718. The cubic root of 11206665 is about 223.7821609358.

Adding to 11206665 its reverse (56660211), we get a palindrome (67866876).

The spelling of 11206665 in words is "eleven million, two hundred six thousand, six hundred sixty-five".