6643430052 has 24 divisors (see below), whose sum is σ = 17715813696. Its totient is φ = 1898122848.

The previous prime is 6643430041. The next prime is 6643430077. The reversal of 6643430052 is 2500343466.

It is a junction number, because it is equal to n+sod(n) for n = 6643429995 and 6643430022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39544143 + ... + 39544310.

It is an arithmetic number, because the mean of its divisors is an integer number (738158904).

Almost surely, 2^6643430052 is an apocalyptic number.

It is an amenable number.

6643430052 is an abundant number, since it is smaller than the sum of its proper divisors (11072383644).

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

6643430052 is a wasteful number, since it uses less digits than its factorization.

6643430052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79088467 (or 79088465 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 6643430052 is about 81507.2392613073. The cubic root of 6643430052 is about 1879.8828631559.

The spelling of 6643430052 in words is "six billion, six hundred forty-three million, four hundred thirty thousand, fifty-two".