220668820516 has 27 divisors (see below), whose sum is σ = 387856420371. Its totient is φ = 109854791424.

The previous prime is 220668820487. The next prime is 220668820523. The reversal of 220668820516 is 615028866022.

The square root of 220668820516 is 469754.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 992880100 + 219675940416 = 31510^2 + 468696^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 327887956 + ... + 327888628.

Almost surely, 2^220668820516 is an apocalyptic number.

220668820516 is the 469754-th square number.

It is an amenable number.

220668820516 is a deficient number, since it is larger than the sum of its proper divisors (167187599855).

220668820516 is an frugal number, since it uses more digits than its factorization.

220668820516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 220668820516 in words is "two hundred twenty billion, six hundred sixty-eight million, eight hundred twenty thousand, five hundred sixteen".