56662609 has 4 divisors (see below), whose sum is σ = 57095280. Its totient is φ = 56229940.

The previous prime is 56662603. The next prime is 56662621. The reversal of 56662609 is 90626665.

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: 90626665 = 5 ⋅18125333.

It is a cyclic number.

It is not a de Polignac number, because 56662609 - 2³ = 56662601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56662601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216139 + ... + 216400.

It is an arithmetic number, because the mean of its divisors is an integer number (14273820).

Almost surely, 2^56662609 is an apocalyptic number.

It is an amenable number.

56662609 is a deficient number, since it is larger than the sum of its proper divisors (432671).

56662609 is a wasteful number, since it uses less digits than its factorization.

56662609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432670.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 56662609 is about 7527.4570075159. The cubic root of 56662609 is about 384.0892827154.

The spelling of 56662609 in words is "fifty-six million, six hundred sixty-two thousand, six hundred nine".