220356666 has 16 divisors (see below), whose sum is σ = 489681600. Its totient is φ = 73452204.

The previous prime is 220356637. The next prime is 220356671. The reversal of 220356666 is 666653022.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220356666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040286 + ... + 2040393.

It is an arithmetic number, because the mean of its divisors is an integer number (30605100).

Almost surely, 2^220356666 is an apocalyptic number.

220356666 is an abundant number, since it is smaller than the sum of its proper divisors (269324934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220356666 is a wasteful number, since it uses less digits than its factorization.

220356666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080690 (or 4080684 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 220356666 is about 14844.4153135110. The cubic root of 220356666 is about 604.0071286237.

The spelling of 220356666 in words is "two hundred twenty million, three hundred fifty-six thousand, six hundred sixty-six".