56661473 has 4 divisors (see below), whose sum is σ = 61812528. Its totient is φ = 51510420.

The previous prime is 56661427. The next prime is 56661491. The reversal of 56661473 is 37416665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56661473 - 2⁸ = 56661217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56661413) 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, 2575511 + ... + 2575532.

It is an arithmetic number, because the mean of its divisors is an integer number (15453132).

Almost surely, 2^56661473 is an apocalyptic number.

It is an amenable number.

56661473 is a deficient number, since it is larger than the sum of its proper divisors (5151055).

56661473 is a wasteful number, since it uses less digits than its factorization.

56661473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151054.

The product of its digits is 90720, while the sum is 38.

The square root of 56661473 is about 7527.3815500478. The cubic root of 56661473 is about 384.0867158943.

The spelling of 56661473 in words is "fifty-six million, six hundred sixty-one thousand, four hundred seventy-three".