6688535404 has 24 divisors (see below), whose sum is σ = 11878707456. Its totient is φ = 3294690000.

The previous prime is 6688535389. The next prime is 6688535431. The reversal of 6688535404 is 4045358866.

It is a happy number.

It is a super-2 number, since 2×6688535404² = 89473011701122886432, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403969 + ... + 420199.

It is an arithmetic number, because the mean of its divisors is an integer number (494946144).

Almost surely, 2^6688535404 is an apocalyptic number.

It is an amenable number.

6688535404 is a deficient number, since it is larger than the sum of its proper divisors (5190172052).

6688535404 is a wasteful number, since it uses less digits than its factorization.

6688535404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17757 (or 17755 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 49.

The square root of 6688535404 is about 81783.4665687387. The cubic root of 6688535404 is about 1884.1277386143.

The spelling of 6688535404 in words is "six billion, six hundred eighty-eight million, five hundred thirty-five thousand, four hundred four".