557866749 has 12 divisors (see below), whose sum is σ = 817590368. Its totient is φ = 338100840.

The previous prime is 557866741. The next prime is 557866763. The reversal of 557866749 is 947668755.

557866749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 557866749 - 2³ = 557866741 is a prime.

It is a super-2 number, since 2×557866749² = 622430619279658002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557866741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768049 + ... + 768774.

Almost surely, 2^557866749 is an apocalyptic number.

It is an amenable number.

557866749 is a deficient number, since it is larger than the sum of its proper divisors (259723619).

557866749 is a wasteful number, since it uses less digits than its factorization.

557866749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536848 (or 1536837 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The square root of 557866749 is about 23619.2029713113. The cubic root of 557866749 is about 823.2090928961.

It can be divided in two parts, 5578 and 66749, that added together give a palindrome (72327).

The spelling of 557866749 in words is "five hundred fifty-seven million, eight hundred sixty-six thousand, seven hundred forty-nine".