6496640 has 32 divisors (see below), whose sum is σ = 15532560. Its totient is φ = 2598400.

The previous prime is 6496631. The next prime is 6496643. The reversal of 6496640 is 466946.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 6496640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6496643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4436 + ... + 5715.

Almost surely, 2^6496640 is an apocalyptic number.

It is an amenable number.

6496640 is an abundant number, since it is smaller than the sum of its proper divisors (9035920).

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

6496640 is a wasteful number, since it uses less digits than its factorization.

6496640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170 (or 10158 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 6496640 is about 2548.8507214037. The cubic root of 6496640 is about 186.5933952792.

The spelling of 6496640 in words is "six million, four hundred ninety-six thousand, six hundred forty".