220766857 has 16 divisors (see below), whose sum is σ = 234223488. Its totient is φ = 207665920.

The previous prime is 220766851. The next prime is 220766873. The reversal of 220766857 is 758667022.

It is a cyclic number.

It is not a de Polignac number, because 220766857 - 2¹¹ = 220764809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220766851) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 449382 + ... + 449872.

It is an arithmetic number, because the mean of its divisors is an integer number (14638968).

Almost surely, 2^220766857 is an apocalyptic number.

It is an amenable number.

220766857 is a deficient number, since it is larger than the sum of its proper divisors (13456631).

220766857 is a wasteful number, since it uses less digits than its factorization.

220766857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 220766857 is about 14858.2252304910. The cubic root of 220766857 is about 604.3816800550.

The spelling of 220766857 in words is "two hundred twenty million, seven hundred sixty-six thousand, eight hundred fifty-seven".