56606661 has 16 divisors (see below), whose sum is σ = 84004800. Its totient is φ = 37673424.

The previous prime is 56606653. The next prime is 56606663. The reversal of 56606661 is 16660665.

It is not a de Polignac number, because 56606661 - 2³ = 56606653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56606663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18535 + ... + 21371.

It is an arithmetic number, because the mean of its divisors is an integer number (5250300).

Almost surely, 2^56606661 is an apocalyptic number.

It is an amenable number.

56606661 is a deficient number, since it is larger than the sum of its proper divisors (27398139).

56606661 is a wasteful number, since it uses less digits than its factorization.

56606661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585 (or 3579 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 56606661 is about 7523.7398280376. The cubic root of 56606661 is about 383.9628259912.

It can be divided in two parts, 5660 and 6661, that added together give a palindrome (12321).

The spelling of 56606661 in words is "fifty-six million, six hundred six thousand, six hundred sixty-one".