6526640 has 40 divisors (see below), whose sum is σ = 16070400. Its totient is φ = 2456576.

The previous prime is 6526627. The next prime is 6526643. The reversal of 6526640 is 466256.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (6526643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040 + ... + 3759.

It is an arithmetic number, because the mean of its divisors is an integer number (401760).

Almost surely, 2^6526640 is an apocalyptic number.

It is an amenable number.

6526640 is an abundant number, since it is smaller than the sum of its proper divisors (9543760).

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

6526640 is a wasteful number, since it uses less digits than its factorization.

6526640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4829 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6526640 is about 2554.7289484405. The cubic root of 6526640 is about 186.8801695419.

The spelling of 6526640 in words is "six million, five hundred twenty-six thousand, six hundred forty".