12566630658 has 32 divisors (see below), whose sum is σ = 26595412992. Its totient is φ = 3950315600.

The previous prime is 12566630653. The next prime is 12566630677. The reversal of 12566630658 is 85603666521.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12566630653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631488 + ... + 651083.

It is an arithmetic number, because the mean of its divisors is an integer number (831106656).

Almost surely, 2^12566630658 is an apocalyptic number.

12566630658 is an abundant number, since it is smaller than the sum of its proper divisors (14028782334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12566630658 is a wasteful number, since it uses less digits than its factorization.

12566630658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282670.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 12566630658 in words is "twelve billion, five hundred sixty-six million, six hundred thirty thousand, six hundred fifty-eight".