6680030638 has 4 divisors (see below), whose sum is σ = 10020045960. Its totient is φ = 3340015318.

The previous prime is 6680030627. The next prime is 6680030671. The reversal of 6680030638 is 8360300866.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6680030638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1670007658 + ... + 1670007661.

It is an arithmetic number, because the mean of its divisors is an integer number (2505011490).

Almost surely, 2^6680030638 is an apocalyptic number.

6680030638 is a deficient number, since it is larger than the sum of its proper divisors (3340015322).

6680030638 is a wasteful number, since it uses less digits than its factorization.

6680030638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340015321.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 6680030638 is about 81731.4543979244. The cubic root of 6680030638 is about 1883.3288162229.

The spelling of 6680030638 in words is "six billion, six hundred eighty million, thirty thousand, six hundred thirty-eight".