4066780643 has 2 divisors, whose sum is σ = 4066780644. Its totient is φ = 4066780642.

The previous prime is 4066780633. The next prime is 4066780651. The reversal of 4066780643 is 3460876604.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4066780643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4066780594 and 4066780603.

It is not a weakly prime, because it can be changed into another prime (4066780633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2033390321 + 2033390322.

It is an arithmetic number, because the mean of its divisors is an integer number (2033390322).

Almost surely, 2^4066780643 is an apocalyptic number.

4066780643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4066780643 is an equidigital number, since it uses as much as digits as its factorization.

4066780643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 44.

The square root of 4066780643 is about 63771.3152051924. The cubic root of 4066780643 is about 1596.1863133174.

The spelling of 4066780643 in words is "four billion, sixty-six million, seven hundred eighty thousand, six hundred forty-three".