6640880260 has 48 divisors (see below), whose sum is σ = 15955914240. Its totient is φ = 2274330240.

The previous prime is 6640880149. The next prime is 6640880261. The reversal of 6640880260 is 620880466.

It is not an unprimeable number, because it can be changed into a prime (6640880261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101506 + ... + 153574.

It is an arithmetic number, because the mean of its divisors is an integer number (332414880).

Almost surely, 2^6640880260 is an apocalyptic number.

It is an amenable number.

6640880260 is an abundant number, since it is smaller than the sum of its proper divisors (9315033980).

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

6640880260 is a wasteful number, since it uses less digits than its factorization.

6640880260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52996 (or 52994 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 6640880260 is about 81491.5962538469. The cubic root of 6640880260 is about 1879.6423285920.

The spelling of 6640880260 in words is "six billion, six hundred forty million, eight hundred eighty thousand, two hundred sixty".