220566670 has 16 divisors (see below), whose sum is σ = 420374448. Its totient is φ = 83036800.

The previous prime is 220566659. The next prime is 220566673. The reversal of 220566670 is 76665022.

It is a happy number.

220566670 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220566673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648556 + ... + 648895.

It is an arithmetic number, because the mean of its divisors is an integer number (26273403).

Almost surely, 2^220566670 is an apocalyptic number.

220566670 is a deficient number, since it is larger than the sum of its proper divisors (199807778).

220566670 is a wasteful number, since it uses less digits than its factorization.

220566670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297475.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 220566670 is about 14851.4871309240. The cubic root of 220566670 is about 604.1989443767.

The spelling of 220566670 in words is "two hundred twenty million, five hundred sixty-six thousand, six hundred seventy".