220716438660 has 72 divisors (see below), whose sum is σ = 675431429400. Its totient is φ = 58336846848.

The previous prime is 220716438643. The next prime is 220716438713. The reversal of 220716438660 is 66834617022.

220716438660 is a `hidden beast` number, since 2 + 207 + 1 + 6 + 4 + 386 + 60 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4290512004 + 216425926656 = 65502^2 + 465216^2 .

It is a super-3 number, since 3×220716438660³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5405335 + ... + 5446014.

It is an arithmetic number, because the mean of its divisors is an integer number (9380992075).

Almost surely, 2^220716438660 is an apocalyptic number.

220716438660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220716438660 is an abundant number, since it is smaller than the sum of its proper divisors (454714990740).

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

220716438660 is a wasteful number, since it uses less digits than its factorization.

220716438660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851477 (or 10851472 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 220716438660 in words is "two hundred twenty billion, seven hundred sixteen million, four hundred thirty-eight thousand, six hundred sixty".