556655779 has 2 divisors, whose sum is σ = 556655780. Its totient is φ = 556655778.

The previous prime is 556655773. The next prime is 556655791. The reversal of 556655779 is 977556655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556655779 - 2⁷ = 556655651 is a prime.

It is not a weakly prime, because it can be changed into another prime (556655773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278327889 + 278327890.

It is an arithmetic number, because the mean of its divisors is an integer number (278327890).

Almost surely, 2^556655779 is an apocalyptic number.

556655779 is a deficient number, since it is larger than the sum of its proper divisors (1).

556655779 is an equidigital number, since it uses as much as digits as its factorization.

556655779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9922500, while the sum is 55.

The square root of 556655779 is about 23593.5537594488. The cubic root of 556655779 is about 822.6130104663.

The spelling of 556655779 in words is "five hundred fifty-six million, six hundred fifty-five thousand, seven hundred seventy-nine".