556666326 has 48 divisors (see below), whose sum is σ = 1282099104. Its totient is φ = 173951232.

The previous prime is 556666301. The next prime is 556666333. The reversal of 556666326 is 623666655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77020 + ... + 83936.

It is an arithmetic number, because the mean of its divisors is an integer number (26710398).

Almost surely, 2^556666326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556666326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (641049552).

556666326 is an abundant number, since it is smaller than the sum of its proper divisors (725432778).

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

556666326 is a wasteful number, since it uses less digits than its factorization.

556666326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7205 (or 7202 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The square root of 556666326 is about 23593.7772728319. Note that the first 3 decimals coincide. The cubic root of 556666326 is about 822.6182058042.

The spelling of 556666326 in words is "five hundred fifty-six million, six hundred sixty-six thousand, three hundred twenty-six".