56477665 has 4 divisors (see below), whose sum is σ = 67773204. Its totient is φ = 45182128.

The previous prime is 56477609. The next prime is 56477669. The reversal of 56477665 is 56677465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29030544 + 27447121 = 5388^2 + 5239^2 .

It is a cyclic number.

It is not a de Polignac number, because 56477665 - 2⁹ = 56477153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56477669) 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, 5647762 + ... + 5647771.

It is an arithmetic number, because the mean of its divisors is an integer number (16943301).

Almost surely, 2^56477665 is an apocalyptic number.

It is an amenable number.

56477665 is a deficient number, since it is larger than the sum of its proper divisors (11295539).

56477665 is a wasteful number, since it uses less digits than its factorization.

56477665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11295538.

The product of its digits is 1058400, while the sum is 46.

The square root of 56477665 is about 7515.1623402293. The cubic root of 56477665 is about 383.6709443264.

The spelling of 56477665 in words is "fifty-six million, four hundred seventy-seven thousand, six hundred sixty-five".