2668637 has 2 divisors, whose sum is σ = 2668638. Its totient is φ = 2668636.

The previous prime is 2668619. The next prime is 2668639. The reversal of 2668637 is 7368662.

2668637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2579236 + 89401 = 1606^2 + 299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2668637 is a prime.

Together with 2668639, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2668637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668639) 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 as a sum of consecutive naturals, namely, 1334318 + 1334319.

It is an arithmetic number, because the mean of its divisors is an integer number (1334319).

2^2668637 is an apocalyptic number.

It is an amenable number.

2668637 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668637 is an equidigital number, since it uses as much as digits as its factorization.

2668637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 2668637 is about 1633.5963393691. The cubic root of 2668637 is about 138.7064002825.

The spelling of 2668637 in words is "two million, six hundred sixty-eight thousand, six hundred thirty-seven".