66220055459 has 4 divisors (see below), whose sum is σ = 66223921104. Its totient is φ = 66216189816.

The previous prime is 66220055449. The next prime is 66220055483. The reversal of 66220055459 is 95455002266.

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

It is a cyclic number.

It is not a de Polignac number, because 66220055459 - 2³² = 61925088163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66220055449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1907012 + ... + 1941425.

It is an arithmetic number, because the mean of its divisors is an integer number (16555980276).

Almost surely, 2^66220055459 is an apocalyptic number.

66220055459 is a deficient number, since it is larger than the sum of its proper divisors (3865645).

66220055459 is a wasteful number, since it uses less digits than its factorization.

66220055459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865644.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 66220055459 in words is "sixty-six billion, two hundred twenty million, fifty-five thousand, four hundred fifty-nine".