556611663 has 8 divisors (see below), whose sum is σ = 747993088. Its totient is φ = 368152344.

The previous prime is 556611623. The next prime is 556611673. The reversal of 556611663 is 366116655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 556611663 - 2⁹ = 556611151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556611623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730081 + ... + 730842.

It is an arithmetic number, because the mean of its divisors is an integer number (93499136).

Almost surely, 2^556611663 is an apocalyptic number.

556611663 is a deficient number, since it is larger than the sum of its proper divisors (191381425).

556611663 is a wasteful number, since it uses less digits than its factorization.

556611663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461053.

The product of its digits is 97200, while the sum is 39.

The square root of 556611663 is about 23592.6188245392. The cubic root of 556611663 is about 822.5912786913.

The spelling of 556611663 in words is "five hundred fifty-six million, six hundred eleven thousand, six hundred sixty-three".