6643427103 has 12 divisors (see below), whose sum is σ = 9602938800. Its totient is φ = 4425777216.

The previous prime is 6643427099. The next prime is 6643427113. The reversal of 6643427103 is 3017243466.

It is a happy number.

6643427103 is a `hidden beast` number, since 6 + 643 + 4 + 2 + 7 + 1 + 0 + 3 = 666.

It is not a de Polignac number, because 6643427103 - 2² = 6643427099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643427113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 251226 + ... + 276407.

It is an arithmetic number, because the mean of its divisors is an integer number (800244900).

Almost surely, 2^6643427103 is an apocalyptic number.

6643427103 is a deficient number, since it is larger than the sum of its proper divisors (2959511697).

6643427103 is a wasteful number, since it uses less digits than its factorization.

6643427103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529038 (or 529035 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 6643427103 is about 81507.2211708877. The cubic root of 6643427103 is about 1879.8825849976.

The spelling of 6643427103 in words is "six billion, six hundred forty-three million, four hundred twenty-seven thousand, one hundred three".