566638749 has 12 divisors (see below), whose sum is σ = 819834496. Its totient is φ = 377133192.

The previous prime is 566638727. The next prime is 566638753. The reversal of 566638749 is 947836665.

It is not a de Polignac number, because 566638749 - 2⁸ = 566638493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 566638695 and 566638704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566638799) 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, 46399 + ... + 57324.

Almost surely, 2^566638749 is an apocalyptic number.

It is an amenable number.

566638749 is a deficient number, since it is larger than the sum of its proper divisors (253195747).

566638749 is a wasteful number, since it uses less digits than its factorization.

566638749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104336 (or 104333 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 566638749 is about 23804.1750329643. The cubic root of 566638749 is about 827.5014370660.

The spelling of 566638749 in words is "five hundred sixty-six million, six hundred thirty-eight thousand, seven hundred forty-nine".