5078666521 has 2 divisors, whose sum is σ = 5078666522. Its totient is φ = 5078666520.

The previous prime is 5078666473. The next prime is 5078666591. The reversal of 5078666521 is 1256668705.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4938575625 + 140090896 = 70275^2 + 11836^2 .

It is a cyclic number.

It is not a de Polignac number, because 5078666521 - 2²¹ = 5076569369 is a prime.

It is not a weakly prime, because it can be changed into another prime (5078666591) 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, 2539333260 + 2539333261.

It is an arithmetic number, because the mean of its divisors is an integer number (2539333261).

Almost surely, 2^5078666521 is an apocalyptic number.

It is an amenable number.

5078666521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5078666521 is an equidigital number, since it uses as much as digits as its factorization.

5078666521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 5078666521 is about 71264.7635300925. The cubic root of 5078666521 is about 1718.8971794079.

The spelling of 5078666521 in words is "five billion, seventy-eight million, six hundred sixty-six thousand, five hundred twenty-one".