662885815684 has 27 divisors (see below), whose sum is σ = 1189153945231. Its totient is φ = 323326367360.

The previous prime is 662885815663. The next prime is 662885815693. The reversal of 662885815684 is 486518588266.

The square root of 662885815684 is 814178.

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 391653175684 + 271232640000 = 625822^2 + 520800^2 .

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, 66757632 + ... + 66767560.

Almost surely, 2^662885815684 is an apocalyptic number.

662885815684 is the 814178-th square number.

It is an amenable number.

662885815684 is a deficient number, since it is larger than the sum of its proper divisors (526268129547).

662885815684 is an frugal number, since it uses more digits than its factorization.

662885815684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19944 (or 9972 counting only the distinct ones).

The product of its digits is 176947200, while the sum is 67.

The spelling of 662885815684 in words is "six hundred sixty-two billion, eight hundred eighty-five million, eight hundred fifteen thousand, six hundred eighty-four".