5456666557 has 2 divisors, whose sum is σ = 5456666558. Its totient is φ = 5456666556.

The previous prime is 5456666539. The next prime is 5456666581. The reversal of 5456666557 is 7556666545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4675687641 + 780978916 = 68379^2 + 27946^2 .

It is a cyclic number.

It is not a de Polignac number, because 5456666557 - 2¹⁹ = 5456142269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5456666498 and 5456666507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5456666597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2728333278 + 2728333279.

It is an arithmetic number, because the mean of its divisors is an integer number (2728333279).

Almost surely, 2^5456666557 is an apocalyptic number.

It is an amenable number.

5456666557 is a deficient number, since it is larger than the sum of its proper divisors (1).

5456666557 is an equidigital number, since it uses as much as digits as its factorization.

5456666557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680000, while the sum is 55.

The square root of 5456666557 is about 73869.2531233395. The cubic root of 5456666557 is about 1760.5261164943.

The spelling of 5456666557 in words is "five billion, four hundred fifty-six million, six hundred sixty-six thousand, five hundred fifty-seven".