66066223 has 4 divisors (see below), whose sum is σ = 66092248. Its totient is φ = 66040200.

The previous prime is 66066197. The next prime is 66066227. The reversal of 66066223 is 32266066.

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 66066223 - 2⁹ = 66065711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66066227) 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, 8736 + ... + 14437.

It is an arithmetic number, because the mean of its divisors is an integer number (16523062).

Almost surely, 2^66066223 is an apocalyptic number.

66066223 is a deficient number, since it is larger than the sum of its proper divisors (26025).

66066223 is a wasteful number, since it uses less digits than its factorization.

66066223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26024.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 66066223 is about 8128.1131266734. The cubic root of 66066223 is about 404.2591200312.

The spelling of 66066223 in words is "sixty-six million, sixty-six thousand, two hundred twenty-three".