55020066 has 8 divisors (see below), whose sum is σ = 110040144. Its totient is φ = 18340020.

The previous prime is 55020061. The next prime is 55020089. The reversal of 55020066 is 66002055.

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

55020066 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55020061) 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, 4585000 + ... + 4585011.

It is an arithmetic number, because the mean of its divisors is an integer number (13755018).

Almost surely, 2^55020066 is an apocalyptic number.

55020066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55020066 is a wasteful number, since it uses less digits than its factorization.

55020066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9170016.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 55020066 is about 7417.5512131700. The cubic root of 55020066 is about 380.3414889645.

The spelling of 55020066 in words is "fifty-five million, twenty thousand, sixty-six".