556659966 has 8 divisors (see below), whose sum is σ = 1113319944. Its totient is φ = 185553320.

The previous prime is 556659947. The next prime is 556660009. The reversal of 556659966 is 669956655.

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

556659966 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46388325 + ... + 46388336.

It is an arithmetic number, because the mean of its divisors is an integer number (139164993).

Almost surely, 2^556659966 is an apocalyptic number.

556659966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556659966 is a wasteful number, since it uses less digits than its factorization.

556659966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92776666.

The product of its digits is 13122000, while the sum is 57.

The square root of 556659966 is about 23593.6424911458. The cubic root of 556659966 is about 822.6150729449.

The spelling of 556659966 in words is "five hundred fifty-six million, six hundred fifty-nine thousand, nine hundred sixty-six".