663289709476 has 27 divisors (see below), whose sum is σ = 1165373079843. Its totient is φ = 330331185600.

The previous prime is 663289709447. The next prime is 663289709477. The reversal of 663289709476 is 674907982366.

The square root of 663289709476 is 814426.

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

663289709476 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 653914822500 + 9374886976 = 808650^2 + 96824^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663289709477) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 509830026 + ... + 509831326.

Almost surely, 2^663289709476 is an apocalyptic number.

663289709476 is the 814426-th square number.

It is an amenable number.

663289709476 is a deficient number, since it is larger than the sum of its proper divisors (502083370367).

663289709476 is an frugal number, since it uses more digits than its factorization.

663289709476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 164602368, while the sum is 67.

The spelling of 663289709476 in words is "six hundred sixty-three billion, two hundred eighty-nine million, seven hundred nine thousand, four hundred seventy-six".