6609400 has 48 divisors (see below), whose sum is σ = 17565840. Its totient is φ = 2265600.

The previous prime is 6609353. The next prime is 6609409. The reversal of 6609400 is 49066.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6609409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 961 + ... + 3760.

It is an arithmetic number, because the mean of its divisors is an integer number (365955).

Almost surely, 2^6609400 is an apocalyptic number.

It is an amenable number.

6609400 is an abundant number, since it is smaller than the sum of its proper divisors (10956440).

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

6609400 is a wasteful number, since it uses less digits than its factorization.

6609400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744 (or 4735 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 6609400 is about 2570.8753373122. The cubic root of 6609400 is about 187.6667553539. Note that the first 3 decimals are identical.

The spelling of 6609400 in words is "six million, six hundred nine thousand, four hundred".