4066778531 has 2 divisors, whose sum is σ = 4066778532. Its totient is φ = 4066778530.

The previous prime is 4066778501. The next prime is 4066778533. The reversal of 4066778531 is 1358776604.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4066778531 is a prime.

It is a super-2 number, since 2×4066778531² = 33077375240405035922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 4066778533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4066778533) 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, 2033389265 + 2033389266.

It is an arithmetic number, because the mean of its divisors is an integer number (2033389266).

Almost surely, 2^4066778531 is an apocalyptic number.

4066778531 is a deficient number, since it is larger than the sum of its proper divisors (1).

4066778531 is an equidigital number, since it uses as much as digits as its factorization.

4066778531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 4066778531 is about 63771.2986460210. The cubic root of 4066778531 is about 1596.1860370017.

The spelling of 4066778531 in words is "four billion, sixty-six million, seven hundred seventy-eight thousand, five hundred thirty-one".