556708861 has 2 divisors, whose sum is σ = 556708862. Its totient is φ = 556708860.

The previous prime is 556708807. The next prime is 556708883. The reversal of 556708861 is 168807655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416404836 + 140304025 = 20406^2 + 11845^2 .

It is a cyclic number.

It is not a de Polignac number, because 556708861 - 2¹⁷ = 556577789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556708891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278354430 + 278354431.

It is an arithmetic number, because the mean of its divisors is an integer number (278354431).

Almost surely, 2^556708861 is an apocalyptic number.

It is an amenable number.

556708861 is a deficient number, since it is larger than the sum of its proper divisors (1).

556708861 is an equidigital number, since it uses as much as digits as its factorization.

556708861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 556708861 is about 23594.6786585450. The cubic root of 556708861 is about 822.6391574183.

The spelling of 556708861 in words is "five hundred fifty-six million, seven hundred eight thousand, eight hundred sixty-one".