4066778501 has 2 divisors, whose sum is σ = 4066778502. Its totient is φ = 4066778500.

The previous prime is 4066778453. The next prime is 4066778531. The reversal of 4066778501 is 1058776604.

4066778501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3892512100 + 174266401 = 62390^2 + 13201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4066778501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4066778531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2033389250 + 2033389251.

It is an arithmetic number, because the mean of its divisors is an integer number (2033389251).

Almost surely, 2^4066778501 is an apocalyptic number.

It is an amenable number.

4066778501 is a deficient number, since it is larger than the sum of its proper divisors (1).

4066778501 is an equidigital number, since it uses as much as digits as its factorization.

4066778501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 4066778501 is about 63771.2984108055. The cubic root of 4066778501 is about 1596.1860330768.

The spelling of 4066778501 in words is "four billion, sixty-six million, seven hundred seventy-eight thousand, five hundred one".