556777799 has 2 divisors, whose sum is σ = 556777800. Its totient is φ = 556777798.

The previous prime is 556777783. The next prime is 556777801. The reversal of 556777799 is 997777655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556777799 - 2⁴ = 556777783 is a prime.

Together with 556777801, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556777759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278388899 + 278388900.

It is an arithmetic number, because the mean of its divisors is an integer number (278388900).

Almost surely, 2^556777799 is an apocalyptic number.

556777799 is a deficient number, since it is larger than the sum of its proper divisors (1).

556777799 is an equidigital number, since it uses as much as digits as its factorization.

556777799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29172150, while the sum is 62.

The square root of 556777799 is about 23596.1394935697. The cubic root of 556777799 is about 822.6731121845.

The spelling of 556777799 in words is "five hundred fifty-six million, seven hundred seventy-seven thousand, seven hundred ninety-nine".