6556640452 has 12 divisors (see below), whose sum is σ = 11972995776. Its totient is φ = 3135784520.

The previous prime is 6556640401. The next prime is 6556640459. The reversal of 6556640452 is 2540466556.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6556640399 and 6556640408.

It is not an unprimeable number, because it can be changed into a prime (6556640459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35633824 + ... + 35634007.

It is an arithmetic number, because the mean of its divisors is an integer number (997749648).

Almost surely, 2^6556640452 is an apocalyptic number.

It is an amenable number.

6556640452 is a deficient number, since it is larger than the sum of its proper divisors (5416355324).

6556640452 is a wasteful number, since it uses less digits than its factorization.

6556640452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71267858 (or 71267856 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 43.

The square root of 6556640452 is about 80973.0847380782. The cubic root of 6556640452 is about 1871.6607066582.

The spelling of 6556640452 in words is "six billion, five hundred fifty-six million, six hundred forty thousand, four hundred fifty-two".