220659664 has 10 divisors (see below), whose sum is σ = 427528130. Its totient is φ = 110329824.

The previous prime is 220659653. The next prime is 220659667. The reversal of 220659664 is 466956022.

It can be written as a sum of positive squares in only one way, i.e., 192654400 + 28005264 = 13880^2 + 5292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220659667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6895599 + ... + 6895630.

It is an arithmetic number, because the mean of its divisors is an integer number (42752813).

Almost surely, 2^220659664 is an apocalyptic number.

It is an amenable number.

220659664 is a deficient number, since it is larger than the sum of its proper divisors (206868466).

220659664 is a wasteful number, since it uses less digits than its factorization.

220659664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13791237 (or 13791231 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 220659664 is about 14854.6175985786. The cubic root of 220659664 is about 604.2838453609.

The spelling of 220659664 in words is "two hundred twenty million, six hundred fifty-nine thousand, six hundred sixty-four".