220660869 has 16 divisors (see below), whose sum is σ = 345651264. Its totient is φ = 123446400.

The previous prime is 220660837. The next prime is 220660871. The reversal of 220660869 is 968066022.

It is not a de Polignac number, because 220660869 - 2⁵ = 220660837 is a prime.

It is a super-2 number, since 2×220660869² = 97382438215670322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220660879) 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, 256752 + ... + 257609.

It is an arithmetic number, because the mean of its divisors is an integer number (21603204).

Almost surely, 2^220660869 is an apocalyptic number.

It is an amenable number.

220660869 is a deficient number, since it is larger than the sum of its proper divisors (124990395).

220660869 is a wasteful number, since it uses less digits than its factorization.

220660869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514388.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 220660869 is about 14854.6581583017. The cubic root of 220660869 is about 604.2849453365.

The spelling of 220660869 in words is "two hundred twenty million, six hundred sixty thousand, eight hundred sixty-nine".