6599566659957 has 8 divisors (see below), whose sum is σ = 8837187974784. Its totient is φ = 4380828225888.

The previous prime is 6599566659923. The next prime is 6599566660111. The reversal of 6599566659957 is 7599566659956.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6599566659957 - 2¹⁰ = 6599566658933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6599566652957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4720719373 + ... + 4720720770.

It is an arithmetic number, because the mean of its divisors is an integer number (1104648496848).

Almost surely, 2^{6599566659957} is an apocalyptic number.

It is an amenable number.

6599566659957 is a deficient number, since it is larger than the sum of its proper divisors (2237621314827).

6599566659957 is a wasteful number, since it uses less digits than its factorization.

6599566659957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9441440379.

The product of its digits is 37200870000, while the sum is 87.

Subtracting 6599566659957 from its reverse (7599566659956), we obtain a palindrome (999999999999).

The spelling of 6599566659957 in words is "six trillion, five hundred ninety-nine billion, five hundred sixty-six million, six hundred fifty-nine thousand, nine hundred fifty-seven".