556799977 has 2 divisors, whose sum is σ = 556799978. Its totient is φ = 556799976.

The previous prime is 556799923. The next prime is 556799987. The reversal of 556799977 is 779997655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534719376 + 22080601 = 23124^2 + 4699^2 .

It is a cyclic number.

It is not a de Polignac number, because 556799977 - 2¹¹ = 556797929 is a prime.

It is not a weakly prime, because it can be changed into another prime (556799917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278399988 + 278399989.

It is an arithmetic number, because the mean of its divisors is an integer number (278399989).

Almost surely, 2^556799977 is an apocalyptic number.

It is an amenable number.

556799977 is a deficient number, since it is larger than the sum of its proper divisors (1).

556799977 is an equidigital number, since it uses as much as digits as its factorization.

556799977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37507050, while the sum is 64.

The square root of 556799977 is about 23596.6094386461. The cubic root of 556799977 is about 822.6840351547.

It can be divided in two parts, 55679 and 9977, that added together give a palindrome (65656).

The spelling of 556799977 in words is "five hundred fifty-six million, seven hundred ninety-nine thousand, nine hundred seventy-seven".