56663785 has 4 divisors (see below), whose sum is σ = 67996548. Its totient is φ = 45331024.

The previous prime is 56663773. The next prime is 56663797. The reversal of 56663785 is 58736665.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (56663773) and next prime (56663797).

It can be written as a sum of positive squares in 2 ways, for example, as 10478169 + 46185616 = 3237^2 + 6796^2 .

It is a cyclic number.

It is not a de Polignac number, because 56663785 - 2⁹ = 56663273 is a prime.

It is a Duffinian 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, 5666374 + ... + 5666383.

It is an arithmetic number, because the mean of its divisors is an integer number (16999137).

Almost surely, 2^56663785 is an apocalyptic number.

It is an amenable number.

56663785 is a deficient number, since it is larger than the sum of its proper divisors (11332763).

56663785 is a wasteful number, since it uses less digits than its factorization.

56663785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11332762.

The product of its digits is 907200, while the sum is 46.

The square root of 56663785 is about 7527.5351211403. The cubic root of 56663785 is about 384.0919398814.

The spelling of 56663785 in words is "fifty-six million, six hundred sixty-three thousand, seven hundred eighty-five".