55666585 has 16 divisors (see below), whose sum is σ = 76171536. Its totient is φ = 38688768.

The previous prime is 55666577. The next prime is 55666613. The reversal of 55666585 is 58566655.

It can be written as a sum of positive squares in 8 ways, for example, as 64 + 55666521 = 8^2 + 7461^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666585 - 2³ = 55666577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24084 + ... + 26293.

It is an arithmetic number, because the mean of its divisors is an integer number (4760721).

Almost surely, 2^55666585 is an apocalyptic number.

It is an amenable number.

55666585 is a deficient number, since it is larger than the sum of its proper divisors (20504951).

55666585 is a wasteful number, since it uses less digits than its factorization.

55666585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50412.

The product of its digits is 1080000, while the sum is 46.

The square root of 55666585 is about 7461.0042889681. The cubic root of 55666585 is about 381.8254390069.

The spelling of 55666585 in words is "fifty-five million, six hundred sixty-six thousand, five hundred eighty-five".