12766657652 has 48 divisors (see below), whose sum is σ = 25984801920. Its totient is φ = 5374812672.

The previous prime is 12766657621. The next prime is 12766657667. The reversal of 12766657652 is 25675666721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12766657594 and 12766657603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4321808 + ... + 4324760.

It is an arithmetic number, because the mean of its divisors is an integer number (541350040).

Almost surely, 2^12766657652 is an apocalyptic number.

It is an amenable number.

12766657652 is an abundant number, since it is smaller than the sum of its proper divisors (13218144268).

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

12766657652 is a wasteful number, since it uses less digits than its factorization.

12766657652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5640 (or 5638 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 53.

The spelling of 12766657652 in words is "twelve billion, seven hundred sixty-six million, six hundred fifty-seven thousand, six hundred fifty-two".