6689905400 has 72 divisors (see below), whose sum is σ = 16072419960. Its totient is φ = 2589566400.

The previous prime is 6689905379. The next prime is 6689905403. The reversal of 6689905400 is 45099866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689905403) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 174797 + ... + 209603.

It is an arithmetic number, because the mean of its divisors is an integer number (223228055).

Almost surely, 2^6689905400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6689905400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8036209980).

6689905400 is an abundant number, since it is smaller than the sum of its proper divisors (9382514560).

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

6689905400 is a wasteful number, since it uses less digits than its factorization.

6689905400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34885 (or 34845 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 6689905400 is about 81791.8418914747. The cubic root of 6689905400 is about 1884.2563702251.

The spelling of 6689905400 in words is "six billion, six hundred eighty-nine million, nine hundred five thousand, four hundred".