2668537644 has 24 divisors (see below), whose sum is σ = 6378457008. Its totient is φ = 867816960.

The previous prime is 2668537633. The next prime is 2668537657. The reversal of 2668537644 is 4467358662.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2711437 + ... + 2712420.

It is an arithmetic number, because the mean of its divisors is an integer number (265769042).

Almost surely, 2^2668537644 is an apocalyptic number.

It is an amenable number.

2668537644 is an abundant number, since it is smaller than the sum of its proper divisors (3709919364).

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

2668537644 is a wasteful number, since it uses less digits than its factorization.

2668537644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423905 (or 5423903 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 51.

The square root of 2668537644 is about 51657.8904331178. The cubic root of 2668537644 is about 1387.0467886894.

The spelling of 2668537644 in words is "two billion, six hundred sixty-eight million, five hundred thirty-seven thousand, six hundred forty-four".