643066063396 has 81 divisors (see below), whose sum is σ = 1216229628369. Its totient is φ = 297465186816.

The previous prime is 643066063333. The next prime is 643066063397. The reversal of 643066063396 is 693360660346.

The square root of 643066063396 is 801914.

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

643066063396 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 only one way, i.e., 392986056996 + 250080006400 = 626886^2 + 500080^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643066063397) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1432218180 + ... + 1432218628.

Almost surely, 2^643066063396 is an apocalyptic number.

643066063396 is the 801914-th square number.

It is an amenable number.

643066063396 is a deficient number, since it is larger than the sum of its proper divisors (573163564973).

643066063396 is an equidigital number, since it uses as much as digits as its factorization.

643066063396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 52.

The spelling of 643066063396 in words is "six hundred forty-three billion, sixty-six million, sixty-three thousand, three hundred ninety-six".