2668479640 has 32 divisors (see below), whose sum is σ = 6040046880. Its totient is φ = 1060997632.

The previous prime is 2668479589. The next prime is 2668479679. The reversal of 2668479640 is 469748662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193057 + ... + 206416.

It is an arithmetic number, because the mean of its divisors is an integer number (188751465).

Almost surely, 2^2668479640 is an apocalyptic number.

2668479640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2668479640 is an abundant number, since it is smaller than the sum of its proper divisors (3371567240).

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

2668479640 is a wasteful number, since it uses less digits than its factorization.

2668479640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399651 (or 399647 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 52.

The square root of 2668479640 is about 51657.3290056697. The cubic root of 2668479640 is about 1387.0367388849.

The spelling of 2668479640 in words is "two billion, six hundred sixty-eight million, four hundred seventy-nine thousand, six hundred forty".