12651666552 has 48 divisors (see below), whose sum is σ = 39159921840. Its totient is φ = 3614761728.

The previous prime is 12651666499. The next prime is 12651666589. The reversal of 12651666552 is 25566615621.

It is a junction number, because it is equal to n+sod(n) for n = 12651666498 and 12651666507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12550753 + ... + 12551760.

It is an arithmetic number, because the mean of its divisors is an integer number (815831705).

Almost surely, 2^12651666552 is an apocalyptic number.

12651666552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12651666552 is an abundant number, since it is smaller than the sum of its proper divisors (26508255288).

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

12651666552 is a wasteful number, since it uses less digits than its factorization.

12651666552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25102532 (or 25102525 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 12651666552 in words is "twelve billion, six hundred fifty-one million, six hundred sixty-six thousand, five hundred fifty-two".