2688663 has 8 divisors (see below), whose sum is σ = 3634288. Its totient is φ = 1767744.

The previous prime is 2688659. The next prime is 2688667. The reversal of 2688663 is 3668862.

It is an interprime number because it is at equal distance from previous prime (2688659) and next prime (2688667).

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

It is not a de Polignac number, because 2688663 - 2² = 2688659 is a prime.

It is a Duffinian number.

2688663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5920 + ... + 6357.

It is an arithmetic number, because the mean of its divisors is an integer number (454286).

2^2688663 is an apocalyptic number.

2688663 is a deficient number, since it is larger than the sum of its proper divisors (945625).

2688663 is a wasteful number, since it uses less digits than its factorization.

2688663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12353.

The product of its digits is 82944, while the sum is 39.

The square root of 2688663 is about 1639.7143043835. The cubic root of 2688663 is about 139.0524964314.

The spelling of 2688663 in words is "two million, six hundred eighty-eight thousand, six hundred sixty-three".