11810661 has 8 divisors (see below), whose sum is σ = 16432320. Its totient is φ = 7531392.

The previous prime is 11810657. The next prime is 11810683. The reversal of 11810661 is 16601811.

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

It is not a de Polignac number, because 11810661 - 2² = 11810657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11810611) 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 7 ways as a sum of consecutive naturals, for example, 85516 + ... + 85653.

It is an arithmetic number, because the mean of its divisors is an integer number (2054040).

Almost surely, 2^11810661 is an apocalyptic number.

It is an amenable number.

11810661 is a deficient number, since it is larger than the sum of its proper divisors (4621659).

11810661 is a wasteful number, since it uses less digits than its factorization.

11810661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171195.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 11810661 is about 3436.6642256700. The cubic root of 11810661 is about 227.7323536802.

The spelling of 11810661 in words is "eleven million, eight hundred ten thousand, six hundred sixty-one".