220605667840 has 60 divisors (see below), whose sum is σ = 528993543474. Its totient is φ = 88232761344.

The previous prime is 220605667829. The next prime is 220605667853. The reversal of 220605667840 is 48766506022.

It can be written as a sum of positive squares in only one way, i.e., 198545101056 + 22060566784 = 445584^2 + 148528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23759839 + ... + 23769121.

Almost surely, 2^220605667840 is an apocalyptic number.

220605667840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220605667840 is an abundant number, since it is smaller than the sum of its proper divisors (308387875634).

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

220605667840 is an frugal number, since it uses more digits than its factorization.

220605667840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18589 (or 9290 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 220605667840 in words is "two hundred twenty billion, six hundred five million, six hundred sixty-seven thousand, eight hundred forty".