56661841 has 4 divisors (see below), whose sum is σ = 56679012. Its totient is φ = 56644672.

The previous prime is 56661827. The next prime is 56661883. The reversal of 56661841 is 14816665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14816665 = 5 ⋅2963333.

It can be written as a sum of positive squares in 2 ways, for example, as 47900241 + 8761600 = 6921^2 + 2960^2 .

It is a cyclic number.

It is not a de Polignac number, because 56661841 - 2⁵ = 56661809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56661841.

It is not an unprimeable number, because it can be changed into a prime (56661641) 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, 1900 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (14169753).

Almost surely, 2^56661841 is an apocalyptic number.

It is an amenable number.

56661841 is a deficient number, since it is larger than the sum of its proper divisors (17171).

56661841 is a wasteful number, since it uses less digits than its factorization.

56661841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17170.

The product of its digits is 34560, while the sum is 37.

The square root of 56661841 is about 7527.4059940992. The cubic root of 56661841 is about 384.0875474035.

The spelling of 56661841 in words is "fifty-six million, six hundred sixty-one thousand, eight hundred forty-one".