3206661643 has 2 divisors, whose sum is σ = 3206661644. Its totient is φ = 3206661642.

The previous prime is 3206661641. The next prime is 3206661659. The reversal of 3206661643 is 3461666023.

3206661643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3206661643 - 2¹ = 3206661641 is a prime.

Together with 3206661641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3206661641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1603330821 + 1603330822.

It is an arithmetic number, because the mean of its divisors is an integer number (1603330822).

Almost surely, 2^3206661643 is an apocalyptic number.

3206661643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3206661643 is an equidigital number, since it uses as much as digits as its factorization.

3206661643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 3206661643 is about 56627.3930443562. The cubic root of 3206661643 is about 1474.6344616356.

The spelling of 3206661643 in words is "three billion, two hundred six million, six hundred sixty-one thousand, six hundred forty-three".