556065666 has 96 divisors (see below), whose sum is σ = 1375308480. Its totient is φ = 160963200.

The previous prime is 556065661. The next prime is 556065667. The reversal of 556065666 is 666560655.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (556065661) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 804381 + ... + 805071.

It is an arithmetic number, because the mean of its divisors is an integer number (14326130).

Almost surely, 2^556065666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556065666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687654240).

556065666 is an abundant number, since it is smaller than the sum of its proper divisors (819242814).

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

556065666 is a wasteful number, since it uses less digits than its factorization.

556065666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The square root of 556065666 is about 23581.0446333490. The cubic root of 556065666 is about 822.3222225815.

The spelling of 556065666 in words is "five hundred fifty-six million, sixty-five thousand, six hundred sixty-six".