2631668 has 36 divisors (see below), whose sum is σ = 5303340. Its totient is φ = 1138176.

The previous prime is 2631661. The next prime is 2631679. The reversal of 2631668 is 8661362.

2631668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 784 + 2630884 = 28^2 + 1622^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11378 + ... + 11606.

It is an arithmetic number, because the mean of its divisors is an integer number (147315).

2^2631668 is an apocalyptic number.

It is an amenable number.

2631668 is an abundant number, since it is smaller than the sum of its proper divisors (2671672).

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

2631668 is a wasteful number, since it uses less digits than its factorization.

2631668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 261 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 2631668 is about 1622.2416589399. The cubic root of 2631668 is about 138.0629132729.

The spelling of 2631668 in words is "two million, six hundred thirty-one thousand, six hundred sixty-eight".