556665540 has 96 divisors (see below), whose sum is σ = 1592002944. Its totient is φ = 145305600.

The previous prime is 556665523. The next prime is 556665559. The reversal of 556665540 is 45566655.

It is a junction number, because it is equal to n+sod(n) for n = 556665492 and 556665501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 587347 + ... + 588293.

It is an arithmetic number, because the mean of its divisors is an integer number (16583364).

Almost surely, 2^556665540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556665540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796001472).

556665540 is an abundant number, since it is smaller than the sum of its proper divisors (1035337404).

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

556665540 is a wasteful number, since it uses less digits than its factorization.

556665540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The square root of 556665540 is about 23593.7606158917. The cubic root of 556665540 is about 822.6178186314.

The spelling of 556665540 in words is "five hundred fifty-six million, six hundred sixty-five thousand, five hundred forty".