55566001 has 4 divisors (see below), whose sum is σ = 57482100. Its totient is φ = 53649904.

The previous prime is 55565989. The next prime is 55566011. The reversal of 55566001 is 10066555.

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 27050401 + 28515600 = 5201^2 + 5340^2 .

It is a cyclic number.

It is not a de Polignac number, because 55566001 - 2⁵ = 55565969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55566011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958006 + ... + 958063.

It is an arithmetic number, because the mean of its divisors is an integer number (14370525).

Almost surely, 2^55566001 is an apocalyptic number.

It is an amenable number.

55566001 is a deficient number, since it is larger than the sum of its proper divisors (1916099).

55566001 is a wasteful number, since it uses less digits than its factorization.

55566001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916098.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 55566001 is about 7454.2605937813. The cubic root of 55566001 is about 381.5953267839.

The spelling of 55566001 in words is "fifty-five million, five hundred sixty-six thousand, one".