220678765 has 4 divisors (see below), whose sum is σ = 264814524. Its totient is φ = 176543008.

The previous prime is 220678753. The next prime is 220678789. The reversal of 220678765 is 567876022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35010889 + 185667876 = 5917^2 + 13626^2 .

It is a cyclic number.

It is not a de Polignac number, because 220678765 - 2⁹ = 220678253 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 22067872 + ... + 22067881.

It is an arithmetic number, because the mean of its divisors is an integer number (66203631).

Almost surely, 2^220678765 is an apocalyptic number.

It is an amenable number.

220678765 is a deficient number, since it is larger than the sum of its proper divisors (44135759).

220678765 is an equidigital number, since it uses as much as digits as its factorization.

220678765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44135758.

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

The square root of 220678765 is about 14855.2605160596. The cubic root of 220678765 is about 604.3012810996.

The spelling of 220678765 in words is "two hundred twenty million, six hundred seventy-eight thousand, seven hundred sixty-five".