2646663 has 8 divisors (see below), whose sum is σ = 3537408. Its totient is φ = 1760184.

The previous prime is 2646659. The next prime is 2646671. The reversal of 2646663 is 3666462.

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

It is not a de Polignac number, because 2646663 - 2² = 2646659 is a prime.

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 (2646613) 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, 906 + ... + 2472.

It is an arithmetic number, because the mean of its divisors is an integer number (442176).

2^2646663 is an apocalyptic number.

2646663 is a deficient number, since it is larger than the sum of its proper divisors (890745).

2646663 is a wasteful number, since it uses less digits than its factorization.

2646663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133.

The product of its digits is 31104, while the sum is 33.

The square root of 2646663 is about 1626.8567853379. The cubic root of 2646663 is about 138.3246400240.

The spelling of 2646663 in words is "two million, six hundred forty-six thousand, six hundred sixty-three".