55001166565 has 8 divisors (see below), whose sum is σ = 66002795640. Its totient is φ = 44000002752.

The previous prime is 55001166559. The next prime is 55001166569. The reversal of 55001166565 is 56566110055.

It can be written as a sum of positive squares in 4 ways, for example, as 1332031009 + 53669135556 = 36497^2 + 231666^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55001166565 - 2⁵ = 55001166533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55001166569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246847 + ... + 413443.

It is an arithmetic number, because the mean of its divisors is an integer number (8250349455).

Almost surely, 2^55001166565 is an apocalyptic number.

It is an amenable number.

55001166565 is a deficient number, since it is larger than the sum of its proper divisors (11001629075).

55001166565 is a wasteful number, since it uses less digits than its factorization.

55001166565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232631.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 55001166565 in words is "fifty-five billion, one million, one hundred sixty-six thousand, five hundred sixty-five".