220666828 has 12 divisors (see below), whose sum is σ = 387065952. Its totient is φ = 110076560.

The previous prime is 220666819. The next prime is 220666837. The reversal of 220666828 is 828666022.

It is an interprime number because it is at equal distance from previous prime (220666819) and next prime (220666837).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62275 + ... + 65722.

It is an arithmetic number, because the mean of its divisors is an integer number (32255496).

Almost surely, 2^220666828 is an apocalyptic number.

It is an amenable number.

220666828 is a deficient number, since it is larger than the sum of its proper divisors (166399124).

220666828 is a wasteful number, since it uses less digits than its factorization.

220666828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128432 (or 128430 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 220666828 is about 14854.8587337612. The cubic root of 220666828 is about 604.2903849078.

The spelling of 220666828 in words is "two hundred twenty million, six hundred sixty-six thousand, eight hundred twenty-eight".