2640268660 has 48 divisors (see below), whose sum is σ = 5617382400. Its totient is φ = 1042283264.

The previous prime is 2640268651. The next prime is 2640268661. The reversal of 2640268660 is 668620462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640268661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1278789 + ... + 1280851.

It is an arithmetic number, because the mean of its divisors is an integer number (117028800).

Almost surely, 2^2640268660 is an apocalyptic number.

2640268660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640268660 is an abundant number, since it is smaller than the sum of its proper divisors (2977113740).

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

2640268660 is a wasteful number, since it uses less digits than its factorization.

2640268660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 2640268660 is about 51383.5446422296. The cubic root of 2640268660 is about 1382.1315270965.

The spelling of 2640268660 in words is "two billion, six hundred forty million, two hundred sixty-eight thousand, six hundred sixty".