557238066 has 96 divisors (see below), whose sum is σ = 1456247808. Its totient is φ = 137839680.

The previous prime is 557238041. The next prime is 557238083. The reversal of 557238066 is 660832755.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2433240 + ... + 2433468.

It is an arithmetic number, because the mean of its divisors is an integer number (15169248).

Almost surely, 2^557238066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 557238066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728123904).

557238066 is an abundant number, since it is smaller than the sum of its proper divisors (899009742).

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

557238066 is a wasteful number, since it uses less digits than its factorization.

557238066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 557238066 is about 23605.8904936882. The cubic root of 557238066 is about 822.8997405902.

The spelling of 557238066 in words is "five hundred fifty-seven million, two hundred thirty-eight thousand, sixty-six".