6688421630 has 32 divisors (see below), whose sum is σ = 13137746400. Its totient is φ = 2431390720.

The previous prime is 6688421611. The next prime is 6688421653. The reversal of 6688421630 is 361248866.

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, 437882 + ... + 452898.

It is an arithmetic number, because the mean of its divisors is an integer number (410554575).

Almost surely, 2^6688421630 is an apocalyptic number.

6688421630 is a deficient number, since it is larger than the sum of its proper divisors (6449324770).

6688421630 is a wasteful number, since it uses less digits than its factorization.

6688421630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19084.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 6688421630 is about 81782.7709850920. The cubic root of 6688421630 is about 1884.1170553605.

The spelling of 6688421630 in words is "six billion, six hundred eighty-eight million, four hundred twenty-one thousand, six hundred thirty".