2668647 has 8 divisors (see below), whose sum is σ = 3591280. Its totient is φ = 1762560.

The previous prime is 2668639. The next prime is 2668663. The reversal of 2668647 is 7468662.

2668647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2668647 - 2³ = 2668639 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 6 + 6⁷ + 8⁷ + 6⁷ + 4⁵ + 7⁴ .

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2668637) 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 7 ways as a sum of consecutive naturals, for example, 3754 + ... + 4407.

It is an arithmetic number, because the mean of its divisors is an integer number (448910).

2^2668647 is an apocalyptic number.

2668647 is a deficient number, since it is larger than the sum of its proper divisors (922633).

2668647 is a wasteful number, since it uses less digits than its factorization.

2668647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273.

The product of its digits is 96768, while the sum is 39.

The square root of 2668647 is about 1633.5994000978. The cubic root of 2668647 is about 138.7065735373.

The spelling of 2668647 in words is "two million, six hundred sixty-eight thousand, six hundred forty-seven".