556266505 has 4 divisors (see below), whose sum is σ = 667519812. Its totient is φ = 445013200.

The previous prime is 556266493. The next prime is 556266527. The reversal of 556266505 is 505662655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505662655 = 5 ⋅101132531.

It can be written as a sum of positive squares in 2 ways, for example, as 319229689 + 237036816 = 17867^2 + 15396^2 .

It is not a de Polignac number, because 556266505 - 2⁷ = 556266377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 55626646 + ... + 55626655.

It is an arithmetic number, because the mean of its divisors is an integer number (166879953).

Almost surely, 2^556266505 is an apocalyptic number.

It is an amenable number.

556266505 is a deficient number, since it is larger than the sum of its proper divisors (111253307).

556266505 is a wasteful number, since it uses less digits than its factorization.

556266505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111253306.

The product of its (nonzero) digits is 270000, while the sum is 40.

The square root of 556266505 is about 23585.3027328461. The cubic root of 556266505 is about 822.4212123852.

The spelling of 556266505 in words is "five hundred fifty-six million, two hundred sixty-six thousand, five hundred five".