5056666861 has 2 divisors, whose sum is σ = 5056666862. Its totient is φ = 5056666860.

The previous prime is 5056666807. The next prime is 5056666873. The reversal of 5056666861 is 1686666505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3096922500 + 1959744361 = 55650^2 + 44269^2 .

It is a cyclic number.

It is not a de Polignac number, because 5056666861 - 2⁷ = 5056666733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5056666361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2528333430 + 2528333431.

It is an arithmetic number, because the mean of its divisors is an integer number (2528333431).

Almost surely, 2^5056666861 is an apocalyptic number.

It is an amenable number.

5056666861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5056666861 is an equidigital number, since it uses as much as digits as its factorization.

5056666861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The square root of 5056666861 is about 71110.2444166802. The cubic root of 5056666861 is about 1716.4116261994.

The spelling of 5056666861 in words is "five billion, fifty-six million, six hundred sixty-six thousand, eight hundred sixty-one".