220871660 has 24 divisors (see below), whose sum is σ = 464955120. Its totient is φ = 88134464.

The previous prime is 220871657. The next prime is 220871671. The reversal of 220871660 is 66178022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4799 + ... + 21558.

It is an arithmetic number, because the mean of its divisors is an integer number (19373130).

Almost surely, 2^220871660 is an apocalyptic number.

220871660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220871660 is an abundant number, since it is smaller than the sum of its proper divisors (244083460).

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

220871660 is a wasteful number, since it uses less digits than its factorization.

220871660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26785 (or 26783 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 220871660 is about 14861.7515791376. The cubic root of 220871660 is about 604.4773027911.

The spelling of 220871660 in words is "two hundred twenty million, eight hundred seventy-one thousand, six hundred sixty".