12504660566 has 4 divisors (see below), whose sum is σ = 18756990852. Its totient is φ = 6252330282.

The previous prime is 12504660559. The next prime is 12504660599. The reversal of 12504660566 is 66506640521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66506640521 = 3121 ⋅21309401.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3126165140 + ... + 3126165143.

It is an arithmetic number, because the mean of its divisors is an integer number (4689247713).

Almost surely, 2^12504660566 is an apocalyptic number.

12504660566 is a deficient number, since it is larger than the sum of its proper divisors (6252330286).

12504660566 is an equidigital number, since it uses as much as digits as its factorization.

12504660566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252330285.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 12504660566 in words is "twelve billion, five hundred four million, six hundred sixty thousand, five hundred sixty-six".