66223563 has 16 divisors (see below), whose sum is σ = 101035776. Its totient is φ = 37795680.

The previous prime is 66223543. The next prime is 66223571. The reversal of 66223563 is 36532266.

It is not a de Polignac number, because 66223563 - 2⁶ = 66223499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66223543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23245 + ... + 25937.

It is an arithmetic number, because the mean of its divisors is an integer number (6314736).

Almost surely, 2^66223563 is an apocalyptic number.

66223563 is a deficient number, since it is larger than the sum of its proper divisors (34812213).

66223563 is a wasteful number, since it uses less digits than its factorization.

66223563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874.

The product of its digits is 38880, while the sum is 33.

The square root of 66223563 is about 8137.7861240020. The cubic root of 66223563 is about 404.5797866797.

The spelling of 66223563 in words is "sixty-six million, two hundred twenty-three thousand, five hundred sixty-three".