56661541 has 6 divisors (see below), whose sum is σ = 58235730. Its totient is φ = 55128816.

The previous prime is 56661533. The next prime is 56661547. The reversal of 56661541 is 14516665.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 37564641 + 19096900 = 6129^2 + 4370^2 .

It is not a de Polignac number, because 56661541 - 2³ = 56661533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56661497 and 56661506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661547) 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 5 ways as a sum of consecutive naturals, for example, 19326 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (9705955).

Almost surely, 2^56661541 is an apocalyptic number.

It is an amenable number.

56661541 is a deficient number, since it is larger than the sum of its proper divisors (1574189).

56661541 is an equidigital number, since it uses as much as digits as its factorization.

56661541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41463 (or 41426 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 56661541 is about 7527.3860668894. The cubic root of 56661541 is about 384.0868695430.

The spelling of 56661541 in words is "fifty-six million, six hundred sixty-one thousand, five hundred forty-one".