11056661 has 8 divisors (see below), whose sum is σ = 13785024. Its totient is φ = 8615520.

The previous prime is 11056657. The next prime is 11056693. The reversal of 11056661 is 16665011.

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

It is a cyclic number.

It is not a de Polignac number, because 11056661 - 2² = 11056657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11056661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11056601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71720 + ... + 71873.

It is an arithmetic number, because the mean of its divisors is an integer number (1723128).

Almost surely, 2^11056661 is an apocalyptic number.

11056661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11056661 is a deficient number, since it is larger than the sum of its proper divisors (2728363).

11056661 is a wasteful number, since it uses less digits than its factorization.

11056661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143611.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 11056661 is about 3325.1557858242. The cubic root of 11056661 is about 222.7792126592.

The spelling of 11056661 in words is "eleven million, fifty-six thousand, six hundred sixty-one".