220066664 has 16 divisors (see below), whose sum is σ = 434342400. Its totient is φ = 104242032.

The previous prime is 220066663. The next prime is 220066669. The reversal of 220066664 is 466660022.

It is a self number, because there is not a number n which added to its sum of digits gives 220066664.

It is not an unprimeable number, because it can be changed into a prime (220066663) 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, 723752 + ... + 724055.

It is an arithmetic number, because the mean of its divisors is an integer number (27146400).

Almost surely, 2^220066664 is an apocalyptic number.

It is an amenable number.

220066664 is a deficient number, since it is larger than the sum of its proper divisors (214275736).

220066664 is a wasteful number, since it uses less digits than its factorization.

220066664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447832 (or 1447828 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 220066664 is about 14834.6440469598. The cubic root of 220066664 is about 603.7420429690.

The spelling of 220066664 in words is "two hundred twenty million, sixty-six thousand, six hundred sixty-four".