55665773 has 4 divisors (see below), whose sum is σ = 58086048. Its totient is φ = 53245500.

The previous prime is 55665749. The next prime is 55665829. The reversal of 55665773 is 37756655.

55665773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37756655 = 5 ⋅7551331.

It is a cyclic number.

It is not a de Polignac number, because 55665773 - 2²⁰ = 54617197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55665713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210103 + ... + 1210148.

It is an arithmetic number, because the mean of its divisors is an integer number (14521512).

Almost surely, 2^55665773 is an apocalyptic number.

It is an amenable number.

55665773 is a deficient number, since it is larger than the sum of its proper divisors (2420275).

55665773 is a wasteful number, since it uses less digits than its factorization.

55665773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420274.

The product of its digits is 661500, while the sum is 44.

The square root of 55665773 is about 7460.9498725028. The cubic root of 55665773 is about 381.8235824547.

The spelling of 55665773 in words is "fifty-five million, six hundred sixty-five thousand, seven hundred seventy-three".