556660177247 has 2 divisors, whose sum is σ = 556660177248. Its totient is φ = 556660177246.

The previous prime is 556660177187. The next prime is 556660177261. The reversal of 556660177247 is 742771066655.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556660177247 - 2¹⁴ = 556660160863 is a prime.

It is a super-2 number, since 2×556660177247² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 556660177192 and 556660177201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556660177547) 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, 278330088623 + 278330088624.

It is an arithmetic number, because the mean of its divisors is an integer number (278330088624).

Almost surely, 2^556660177247 is an apocalyptic number.

556660177247 is a deficient number, since it is larger than the sum of its proper divisors (1).

556660177247 is an equidigital number, since it uses as much as digits as its factorization.

556660177247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14817600, while the sum is 56.

The spelling of 556660177247 in words is "five hundred fifty-six billion, six hundred sixty million, one hundred seventy-seven thousand, two hundred forty-seven".