11800661 has 4 divisors (see below), whose sum is σ = 12088524. Its totient is φ = 11512800.

The previous prime is 11800639. The next prime is 11800673. The reversal of 11800661 is 16600811.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 844561 + 10956100 = 919^2 + 3310^2 .

It is not a de Polignac number, because 11800661 - 2¹⁴ = 11784277 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 (11800561) 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, 143870 + ... + 143951.

It is an arithmetic number, because the mean of its divisors is an integer number (3022131).

Almost surely, 2^11800661 is an apocalyptic number.

It is an amenable number.

11800661 is a deficient number, since it is larger than the sum of its proper divisors (287863).

11800661 is an equidigital number, since it uses as much as digits as its factorization.

11800661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287862.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 11800661 is about 3435.2090183859. The cubic root of 11800661 is about 227.6680624276.

The spelling of 11800661 in words is "eleven million, eight hundred thousand, six hundred sixty-one".