6501680 has 40 divisors (see below), whose sum is σ = 15354672. Its totient is φ = 2559744.

The previous prime is 6501647. The next prime is 6501689. The reversal of 6501680 is 861056.

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

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (6501689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4754 + ... + 5966.

Almost surely, 2^6501680 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 6501680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7677336).

6501680 is an abundant number, since it is smaller than the sum of its proper divisors (8852992).

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

6501680 is a wasteful number, since it uses less digits than its factorization.

6501680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 6501680 is about 2549.8392106170. The cubic root of 6501680 is about 186.6416349654.

The spelling of 6501680 in words is "six million, five hundred one thousand, six hundred eighty".