566601656389 has 4 divisors (see below), whose sum is σ = 569075899660. Its totient is φ = 564127413120.

The previous prime is 566601656363. The next prime is 566601656393. The reversal of 566601656389 is 983656106665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 408084604225 + 158517052164 = 638815^2 + 398142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566601656389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566601656339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237121292 + ... + 1237121749.

It is an arithmetic number, because the mean of its divisors is an integer number (142268974915).

Almost surely, 2^566601656389 is an apocalyptic number.

It is an amenable number.

566601656389 is a deficient number, since it is larger than the sum of its proper divisors (2474243271).

566601656389 is a wasteful number, since it uses less digits than its factorization.

566601656389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474243270.

The product of its (nonzero) digits is 41990400, while the sum is 61.

The spelling of 566601656389 in words is "five hundred sixty-six billion, six hundred one million, six hundred fifty-six thousand, three hundred eighty-nine".