54666565 has 4 divisors (see below), whose sum is σ = 65599884. Its totient is φ = 43733248.

The previous prime is 54666541. The next prime is 54666587. The reversal of 54666565 is 56566645.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56566645 = 5 ⋅11313329.

It can be written as a sum of positive squares in 2 ways, for example, as 17322244 + 37344321 = 4162^2 + 6111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54666565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5466652 + ... + 5466661.

It is an arithmetic number, because the mean of its divisors is an integer number (16399971).

Almost surely, 2^54666565 is an apocalyptic number.

It is an amenable number.

54666565 is a deficient number, since it is larger than the sum of its proper divisors (10933319).

54666565 is a wasteful number, since it uses less digits than its factorization.

54666565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10933318.

The product of its digits is 648000, while the sum is 43.

The square root of 54666565 is about 7393.6841290388. The cubic root of 54666565 is about 379.5251802626.

The spelling of 54666565 in words is "fifty-four million, six hundred sixty-six thousand, five hundred sixty-five".