6640513260 has 48 divisors (see below), whose sum is σ = 18764037600. Its totient is φ = 1754555904.

The previous prime is 6640513249. The next prime is 6640513267. The reversal of 6640513260 is 623150466.

It is not an unprimeable number, because it can be changed into a prime (6640513267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501145 + ... + 514224.

It is an arithmetic number, because the mean of its divisors is an integer number (390917450).

Almost surely, 2^6640513260 is an apocalyptic number.

6640513260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6640513260 is an abundant number, since it is smaller than the sum of its proper divisors (12123524340).

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

6640513260 is a wasteful number, since it uses less digits than its factorization.

6640513260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015490 (or 1015488 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 6640513260 is about 81489.3444568061. The cubic root of 6640513260 is about 1879.6077025879.

The spelling of 6640513260 in words is "six billion, six hundred forty million, five hundred thirteen thousand, two hundred sixty".